Perceived racial discrimination and risk of uterine leiomyomata

BACKGROUND: The incidence of uterine leiomyomata (fibroids, myomas) is 2-3 times higher in black women than white women. Black women also report higher levels of racial discrimination. We evaluated the hypothesis that greater exposure to racism increases myoma risk in black women. METHODS: Data were derived from the Black Women's Health Study, a prospective cohort study of US black women age 21-69 years in 1995. In 1997, women reported on "everyday" and "lifetime" experiences of racism. From 1997 through 2003, we followed 22,002 premenopausal women to assess the association between self-reported racism and risk of myomas. Incidence rate ratios (IRRs) and 95% confidence intervals (CIs) were estimated from Cox regression models. RESULTS: During 107,127 person-years of follow-up, 3440 new cases of uterine myomas confirmed by ultrasound (n = 2774) or surgery (n = 666) were reported. All IRRs for "lifetime" and "everyday" experiences of racism were above 1.0. Using a summary variable that averaged the responses from 5 "everyday" racism items, multivariable IRRs comparing quartiles 2, 3, and 4 to quintile 1 (lowest) were 1.16 (95% CI = 1.04-1.29), 1.19 (1.06-1.32), and 1.27 (1.14-1.43), respectively. Multivariable IRRs comparing women who reported 1, 2, or 3 lifetime occurrences of major discrimination (ie, job, housing, or police) relative to those who reported none were 1.04 (0.96-1.13), 1.17 (1.07-1.28), and 1.24 (1.10-1.39), respectively. Results did not vary according to case definition (ultrasound vs. surgery) or health care utilization. Associations were weaker among foreign-born women and among women with higher coping skills. CONCLUSIONS: Perceived racism was associated with an increased risk of uterine myomas in US-born black women.     

Reproductive factors, hormonal contraception, and risk of uterine leiomyomata in African-American women: a prospective study

The authors assessed the risk of uterine leiomyomata in relation to reproductive factors and hormonal contraception in a prospective cohort study of US Black women. From March 1997 through March 2001, the authors followed 22,895 premenopausal women with intact uteri and no prior self-reported diagnosis of uterine leiomyomata. The authors used age- and time-stratified Cox regression models to estimate incidence rate ratios for self-reported uterine leiomyomata, confirmed by ultrasound or hysterectomy, in association with selected reproductive and hormonal factors. During 76,711 person-years of follow-up, 2,279 new cases of ultrasound- or hysterectomy-confirmed uterine leiomyomata were self-reported. After adjustment for age, body mass index, smoking, alcohol intake, and other reproductive covariates, the risk of ultrasound- or hysterectomy-confirmed leiomyomata was inversely associated with age at menarche, parity, and age at first birth and positively associated with years since last birth. Overweight or obesity appeared to attenuate the inverse association between parity and uterine leiomyomata. Current use of progestin-only injectables was inversely associated with risk. No consistent patterns were observed for other forms of hormonal contraception. Reproductive history is an important determinant of leiomyomata risk in premenopausal US Black women. Progestin-only injectables may reduce risk.     

Hair relaxer use and risk of uterine leiomyomata in African-American women

Hair relaxers are used by millions of black women, possibly exposing them to various chemicals through scalp lesions and burns. In the Black Women's Health Study, the authors assessed hair relaxer use in relation to uterine leiomyomata incidence. In 1997, participants reported on hair relaxer use (age at first use, frequency, duration, number of burns, and type of formulation). From 1997 to 2009, 23,580 premenopausal women were followed for incident uterine leiomyomata. Multivariable Cox regression was used to estimate incidence rate ratios and 95% confidence intervals. During 199,991 person-years, 7,146 cases of uterine leiomyomata were reported as confirmed by ultrasound (n = 4,630) or surgery (n = 2,516). The incidence rate ratio comparing ever with never use of relaxers was 1.17 (95% confidence interval (CI): 1.06, 1.30). Positive trends were observed for frequency of use (P(trend) < 0.001), duration of use (P(trend) = 0.015), and number of burns (P(trend) < 0.001). Among long-term users (≥10 years), the incidence rate ratios for frequency of use categories 3-4, 5-6, and ≥7 versus 1-2 times/year were 1.04 (95% CI: 0.92, 1.19), 1.12 (95% CI: 0.99, 1.27), and 1.15 (95% CI: 1.01, 1.31), respectively (P(trend) = 0.002). Risk was unrelated to age at first use or type of formulation. These findings raise the hypothesis that hair relaxer use increases uterine leiomyomata risk.     

A prospective study of hypertension and risk of uterine leiomyomata

Although uterine leiomyomata (also known as fibroids or myomas) affect the reproductive health and well-being of approximately 25% of premenopausal women, risk factors are poorly understood. Elevated diastolic blood pressure may increase fibroid risk through uterine smooth muscle injury, not unlike atherosclerosis. The authors prospectively examined the relation between diastolic blood pressure and incidence of clinically detected leiomyomata. The sample included 104,233 premenopausal nurses from 14 US states enrolled in the Nurses' Health Study II. Participants, aged 25-42 years, had intact uteri and no history of cancer or fibroids at enrollment in 1989. During the 827,348 woman-years of follow-up (1989-1999), 7,466 incident diagnoses of uterine leiomyomata, confirmed by ultrasound or hysterectomy, were reported. With a multivariable Cox proportional hazards model, the relative risk of self-reported ultrasound- or hysterectomy-confirmed uterine leiomyomata according to diastolic blood pressure in 1989 and time-varying antihypertensive use was estimated. With adjustment for age, race/ethnicity, body mass index, and reproductive history covariates, for every 10-mmHg increase in diastolic blood pressure, the risk of fibroids rose 8% (5-11%) and 10% (7-13%) among nonusers and users of antihypertensive medications, respectively. Elevated blood pressure has an independent, positive association with risk for clinically detected uterine leiomyomata among premenopausal women. Investigating this association may suggest possible pathways to prevent fibroids.     

孕前体重指数、孕期体重增加与新生儿窒息的关系

目的 了解孕前体重指数(BMI)、孕期体重增加与新生儿窒息发生危险的关系.方法 数据来自"中美预防出生缺陷和残疾合作项目"中嘉兴地区的围产保健监测数据库.研究对象为1995-2000年在嘉兴地区参加婚前/孕前体检且分娩单胎活产儿孕满20周的83 030名孕产妇.运用χ2检验或趋势χ2检验比较不同BMI组或其他特征人群新生儿窒息发病率的差别,利用多元logistic回归分析孕前BMI、孕期体重增加与新生儿窒息发生危险之间的关系.结果 新生儿窒息发病率为11.3%(95% CI:11.1%～11.6%).新生儿窒息发病率从BMI＜18.5 kg/m2组的11.0%(95% CI:10.5%～11.5%)逐渐升至BMI≥25.0 kg/m2组的12.9%(95% CI:11.6%～14.4%),自孕期体重增加＜0.3 kg/wk的12.4%(95% CI:11.9%～13.0%)逐渐降至≥0.5 kg/wk的10.6%(95% CI:10.1%～11.0%).孕前BMI≥25.0 kg/m2组的新生儿重度窒息发生率高于BMI更低组.在调整了地区、年龄、文化程度、职业、产次、产前检查次数、孕期高危因素、产时高危因素、孕周和出生体重后,以BMI＜18.5 kg/m2组为参照组,BMI为18.5～22.9 kg/m2、23.0～24.9 kg/m2和≥25.0 kg/m2组发生新生儿窒息的OR值分别为1.03(95% CI:0.97～1.09)、1.06(95% CI:0.96～1.16)和1.14(95% CI:1.00～1.31).进一步调整孕期增重后,上述OR值分别为1.02(95% CI:0.95～1.09)、1.01(95% CI:0.90～1.13)和1.08(95% CI:0.92～1.28).以孕期体重增加≥0.5 kg/wk组作为参照,孕期体重增加为0.3～kg/wk和＜0.3 kg/wk组发生新生儿窒息的OR值分别为1.06(95% CI:1.01～1.12)和1.09(95% CI:1.02～1.20).结论 孕期体重增加＜0.5 kg/wk加大新生儿窒息发生的危险,提示临床上宜对妇女孕前的BMI进行监测,并据此进行孕前指导和孕期管理,以保持合理的孕期体重,降低新生儿窒息的发生危险.     

Racial discrimination and the incidence of hypertension in US black women

PURPOSE: Unique experiences associated with "race," such as racism, may adversely affect health. Our goal is to assess whether racism is associated with the occurrence of hypertension in African-American women. METHODS: In the first prospective examination of perceived experiences of racism in relation to the incidence of hypertension, we used data from the Black Women's Health Study, a follow-up study of US black women that began in 1995. The 1997 follow-up questionnaire contained eight questions designed to measure personally mediated racism and institutionalized racism. Cox proportional hazard models were used to estimate incidence rate ratios (IRRs), with control for age, body mass index, and questionnaire period. RESULTS: There were 2316 incident cases of hypertension reported during 104,574 person-years of observation from 1997 to 2001. Most women reported experiences of racism. In the total sample, IRRs for the association of racism with incident hypertension were close to the null. However, some positive associations were observed for personally mediated racism in women born outside the United States. CONCLUSIONS: There may be an increase in hypertension associated with experiences of racism in certain subgroups of African-American women.     

妇女孕前体质量指数、孕期增重对子痫前期-子痫影响研究

目的 分析孕妇孕前体质量指数(BMI)、孕期各阶段增重、孕期总增重与子痫前期-子痫（PE-E)发生的相关性。方法 采用概率比例规模抽样法(PPS抽样),招募西南三省5 396例单胎妊娠孕妇为研究对象,收集其一般人口学资料,测量获得其身高、孕前体质量、每次产前检查的体质量等指标,并计算孕期各阶段增重和孕期总增重。根据美国医学研究院(IOM)标准定义其孕期增重是否适宜。采用logistic回归分析孕前BMI、孕期增重指标与PE-E的关系。结果 与孕前BMI处于正常范围内的孕妇相比,孕前BMI较低者PE-E发生的可能性较低(OR=0.19,95%CI:0.03～0.62),孕前超重、肥胖的孕妇发病风险增加(超重OR=3.69,95%CI:2.21～6.01;肥胖OR=6.12,95%CI:1.68～17.30)。孕中期增重速率过大(OR=2.24,95%CI:1.25～4.35)、妊娠期总增重过高者(OR=1.70,95%CI:1.02～2.85)发生PE-E的风险增加。结论 孕前BMI、孕期增重和PE-E的发生密切相关,育龄妇女孕前应尽量达到正常体质量标准,孕期保持适宜的体质量增加,以减少PE-E发生的可能性。     

Associations of weight,weight change,and body mass with breast cancer risk in Hispanic and non-Hispanic white women

PURPOSE: A wealth of studies have examined the effects of weight, weight gain, and obesity on breast cancer risk; however, few have examined this relationship in Hispanic white women, a population with the highest rate of obesity in the U.S. METHODS: A population-based case-control study was conducted in New Mexico of Hispanic (n = 694) and non-Hispanic (n = 813) white women with incident breast cancer during the period of January 1, 1992 through December 31, 1994. Conditional logistic regression models were fitted to estimate the relative risk of breast cancer for levels of weight, weight change, and body mass index (BMI) and to assess differences in the effects by ethnicity, menopausal status, early life BMI, and estrogen receptor/progesterone receptor (ER/PR) expression in tumors. RESULTS: Weight change from age 18 to usual adult weight was associated with increased risk of breast cancer among Hispanics [4th quartile vs. baseline, odds ratio (OR): 2.41; 95% confidence interval (CI): 1.45-4.03] with no substantial variation by menopausal status. In non-Hispanic white women, weight change was a risk factor for those in the post-menopausal group (4th quartile vs. baseline, OR: 2.27; 95% CI: 1.09-4.73). The effect of usual BMI (test for interaction p = 0.04) and weight change (test for interaction p = 0.03) differed by ethnicity. Increased risk from weight gain was largely restricted to women who were lean at age 18 and those with ER(+)/PR(+) tumors. Height, weight at age 18, and BMI at age 18 were not associated with risk in either ethnic group. CONCLUSIONS: Weight change and obesity are risk factors for breast cancer in both Hispanic and non-Hispanic white women. However, the risk for Hispanic women is evident independent of menopausal status, while the risk for non-Hispanics is apparent in post-menopausal women. Due to the increasing prevalence of adult obesity, particularly among Hispanic women, adult weight gain may be an important modifiable risk factor for the primary prevention of breast cancer among Hispanic populations.     

A prospective study of the effect of childbearing on weight gain in African-American women

OBJECTIVE: To prospectively assess the influence of bearing a first, second, or later child on weight gain among African-American women in the context of other risk factors. RESEARCH METHODS AND PROCEDURES: Data were obtained in a prospective follow-up study of African-American women from across the U.S. who are participants in the Black Women's Health Study. Postal questionnaires were used to collect baseline data in 1995 and follow-up data in 1997 and 1999. Parous and nulliparous women (11,196) (21 to 39 years old at baseline), of whom 1230 had a singleton birth during follow-up, are the subjects of the present analyses. We assessed change in BMI (kilograms per meter squared) in relation to childbearing during 4 years of follow-up, with use of multivariable linear regression to control for important risk factors. RESULTS: During 4 years of follow-up, the BMI of participants increased by an average of 1.6 kg/m2, equivalent to a weight gain of approximately 4.4 kg. Women who had a child during follow-up gained more weight than women who remained nulliparous, and those who had a first child gained more than those who had a second or later child. The weight gain associated with childbearing increased with increasing baseline BMI and was appreciable among heavier women. For example, among women with a baseline index of 36, the increase in BMI for women who bore a first child was 1.1 kg/m2 more than that of nulliparous women, equivalent to a difference in weight gain of approximately 3.0 kg. DISCUSSION: Childbearing is an important contributor to weight gain among African-American women.     

Prepregnancy body mass index and gestational weight gain as risk factors for preeclampsia and transient hypertension

PURPOSE: Recent studies suggest prepregnancy obesity is a risk factor for preeclampsia, although only a handful of studies have examined the effect of gestational weight gain. The authors analyzed the effect of prepregnancy body mass index (BMI) and weight gain during pregnancy on risk of preeclampsia and transient hypertension.METHODS: Subjects were participants in a prospective cohort study of women who received prenatal care from thirteen obstetric practices in southern Connecticut (4/88-12/91). The women were interviewed in-person before 16 weeks gestation and in the immediate postpartum period. All subjects' hospital delivery charts were abstracted. BMI was categorized as: <19.8 (underweight), 19.8-26 (normal: referent), 26-29 (overweight), >29 (obese). A gestational weight gain index, created using multiple linear regression, compared observed weight gain to the weight gain expected after adjustment for significant covariables (e.g. gestational aged at delivery). Logistic regression was used to estimate risk of preeclampsia (N = 44) and transient hypertension (N = 172) associated with prepregnancy BMI and gestational weight gain.RESULTS: Obese women had a mild increased risk of preeclampsia (OR = 1.81; 0.73-4.52); women in the other BMI categories had risks similar to that of normal BMI subjects. In contrast, risk of transient hypertension was substantially decreased among underweight women (OR = 0.35; 0.14-0.87) and substantially increased among obese women (OR = 3.43; 2.27-5.21). Higher than expected gestational weight gain did not increase the risk of preeclampsia. In contrast, risk of transient hypertension was increased over twofold among women in the highest quartile of the weight gain index (OR = 2.55; 1.66-3.92).CONCLUSIONS: Obesity appears to be a strong risk factor for transient hypertension and a milder risk factor for preeclampsia. High gestational weight gain was associated with increased risk of transient hypertension but not preeclampsia.     

Serum dioxin concentrations and risk of uterine leiomyoma in the Seveso Women's Health Study

Uterine leiomyomata (fibroids), benign neoplasms of the smooth muscle, are a major cause of hysterectomy. Exposure to hormonally active chemicals may play an etiologic role. The authors investigated the risk of uterine leiomyoma associated with exposure to 2,3,7,8,-tetrachlorodibenzo-p-dioxin (TCDD) for women who resided near Seveso, Italy, in 1976 at the time of a chemical explosion. Twenty years later, women enrolled in the Seveso Women's Health Study were asked about history of fibroids, medical records were obtained, and vaginal ultrasonography was performed for a subset. Serum collected soon after the explosion was analyzed for TCDD. A likelihood-based method that combines both historical and current status (ultrasound) data was adapted to estimate the hazard ratio. Of 956 eligible women, 251 (26.3%) had fibroids. Compared with that for women with TCDD levels of < or = 20 parts per trillion, the age-adjusted hazard ratios were 0.58 (95% confidence interval: 0.41, 0.81) for women with levels of 20.1-75.0 parts per trillion and 0.62 (95% confidence interval: 0.44, 0.89) for women with levels of >75.0 parts per trillion. This finding suggests that TCDD may have antiestrogenic effects in the uterine myometrium, in contrast to apparently estrogenic effects previously found in the breast of Seveso Women's Health Study women.     

Comparison of self-reported with objectively assessed energy expenditure in black and white women before and after weight loss

BACKGROUND: Weight maintenance is less successful in black women than in white women after weight loss. OBJECTIVE: We compared objectively assessed total energy expenditure (TEE) with estimates of energy expenditure (EE) from self-reported physical activity (PA) in overweight black and white women before and after weight loss. We also compared those values with values in never-overweight control subjects. DESIGN: A total of 20 white and 21 black premenopausal women were evaluated while overweight and weight reduced; 20 white and 14 black control subjects (matched with women in the weight-reduced state) were evaluated once. Weight loss of >/=10 kg was achieved by energy restriction in the overweight subjects. The evaluations were as follows: body composition (dual-energy X-ray absorptiometry), free-living TEE (doubly labeled water), Tecumseh Occupational Activity Questionnaire, Minnesota Leisure Time PA Questionnaire, and Baecke Activity Questionnaire. RESULTS: Questionnaire estimates of TEE were overestimated when compared with TEE (P < 0.001). Overweight women overestimated TEE 49% more than did never-overweight control subjects. After weight loss, white women reduced overestimation of EE 48% (P < 0.05), so that their overestimation of EE was not different from that of black and white control subjects. Black women overestimated to the same extent both before and after weight loss. CONCLUSIONS: Premenopausal women overestimate PA estimates on questionnaires. Overestimation of PA in weight-reduced black women is greater than in weight-reduced white women and never-overweight black and white women.     

Prepregnancy body mass index and the occurrence of severe hypertensive disorders of pregnancy

BACKGROUND: Prepregnancy overweight is a risk factor for mild preeclampsia and mild transient hypertension of pregnancy. Its association with severe subtypes of these disorders has received less attention. METHODS: To assess the association of prepregnancy body mass index (BMI) with severe and mild preeclampsia and transient hypertension of pregnancy, we used data from a 1958-1964 prospective cohort study of 38,188 pregnant women receiving care at 12 U.S. hospitals. RESULTS: There was a monotonic, dose-response relation between prepregnancy BMI and risk of both severe and mild preeclampsia, as well as the risk of severe and mild transient hypertension of pregnancy. Compared with white women with a BMI of 20, the odds ratios for severe preeclampsia at BMI values of 25 and 30 in white women were 1.7 (95% confidence interval = 1.1-2.5) and 3.4 (2.1-5.6), respectively, and 2.1 (1.4-3.2) and 3.2 (2.1-5.0) in black women. The effect of BMI on risk of severe preeclampsia was similar to its effect on mild disease. Compared with the same referent, odds ratios for severe transient hypertension of pregnancy at BMI values of 25 and 30 in white women were 3.6 (2.0-6.5) and 8.8 (4.4-18), respectively, and 3.0 (1.6-5.8) and 4.9 (2.5-9.6) in black women. Overweight was a stronger risk factor for severe than for mild transient hypertension. CONCLUSIONS: Incidence of both mild and severe hypertensive disorders of pregnancy rises with increasing BMI. Escalating obesity rates may increase pregnancy hypertensive disorders and ensuing perinatal morbidity.     

Body fat distribution in white and black women: different patterns of intraabdominal and subcutaneous abdominal adipose tissue utilization with weight loss.

BACKGROUND: Intraabdominal adipose tissue (IAAT) is the body fat depot most strongly related to disease risk. Weight reduction is advocated for overweight people to reduce total body fat and IAAT, although little is known about the effect of weight loss on abdominal fat distribution in different races. OBJECTIVE: We compared the effects of diet-induced weight loss on changes in abdominal fat distribution in white and black women. DESIGN: We studied 23 white and 23 black women, similar in age and body composition, in the overweight state [mean body mass index (BMI; in kg/m(2)): 28.8] and the normal-weight state (mean BMI: 24.0) and 38 never-overweight control women (mean BMI: 23.4). We measured total body fat by using a 4-compartment model, trunk fat by using dual-energy X-ray absorptiometry, and cross-sectional areas of IAAT (at the fourth and fifth lumbar vertebrae) and subcutaneous abdominal adipose tissue (SAAT) by using computed tomography. RESULTS: Weight loss was similar in white and black women (13.1 and 12.6 kg, respectively), as were losses of total fat, trunk fat, and waist circumference. However, white women lost more IAAT (P < 0.001) and less SAAT (P < 0.03) than did black women. Fat patterns regressed toward those of their respective control groups. Changes in waist circumference correlated with changes in IAAT in white women (r = 0.54, P < 0.05) but not in black women (r = 0.19, NS). CONCLUSIONS: Despite comparable decreases in total and trunk fat, white women lost more IAAT and less SAAT than did black women. Waist circumference was not a suitable surrogate marker for tracking changes in the visceral fat compartment in black women.     

Association of weight change with ethnicity and life course socioeconomic position among Brazilian civil servants

BACKGROUND: Adult weight gain is generally associated with ethnicity of African descent, in addition to low socioeconomic position (SEP), but little information is available from the African diaspora in less-developed countries. We evaluated ethnic differences in adult weight change and the role of life course SEP in those differences. METHODS: We conducted a cross-sectional analysis of baseline data (1999-2001) from 2594 non-faculty civil servants working at university campuses in Rio de Janeiro (Brazil) and participating in the longitudinal Pró-Saúde Study. Weight and height were measured at study entry whereas ethnicity, markers of SEP, and weight at age 20 were assessed through self-administered questionnaire. RESULTS: Black and mulatto women gained, respectively, an excess of 1.6 kg and 1.2 kg per 10 years of adult life, compared with whites. After adjustment for markers of participants' early and later-life SEP, the estimates of excess weight gain for black and mulatto women decreased by about one-third, but a statistically significant estimate was still observed for black women. Among men, neither unadjusted nor adjusted ethnic gradients in weight gain were relevant. CONCLUSIONS: Only among women, black and mulatto ethnicity was associated with increased weight gain, which was partially explained through the association with their lower SEP.     

Combined effects of prepregnancy body mass index and weight gain during pregnancy on the risk of preterm delivery

BACKGROUND: The association between excessive gestational weight gain and preterm delivery is unclear, as is the association between low gestational weight gain and preterm delivery among overweight and obese women. METHODS: Using data from the Pregnancy Risk Assessment Monitoring System in 21 states, we estimated the risk of very (20-31 weeks) and moderately (32-36 weeks) preterm delivery associated with a combination of prepregnancy body mass index (BMI) and gestational weight gain among 113,019 women who delivered a singleton infant during 1996-2001. We categorized average weight gain (kilograms per week) as very low (<0.12), low (0.12-0.22), moderate (0.23-0.68), high (0.69-0.79), or very high (>0.79). We categorized prepregnancy BMI (kg/m) as underweight (<19.8), normal (19.8-26.0), overweight (26.1-28.9), obese (29.0-34.9), or very obese (>or=35.0). We examined associations for all women and for all women with no complications adjusting for covariates. RESULTS: There was a strong association between very low weight gain and very preterm delivery that varied by prepregnancy BMI, with the strongest association among underweight women (adjusted odds ratio = 9.8; 95% confidence interval = 7.0-13.8) and the weakest among very obese women (2.3; 1.8-3.1). Very low weight gain was not associated with moderately preterm delivery for overweight or obese women. Women with very high weight gain had approximately twice the odds of very preterm delivery, regardless of prepregnancy BMI. CONCLUSIONS: This study supports concerns about very low weight gain during pregnancy, even among overweight and obese women, and also suggests that high weight gain, regardless of prepregnancy BMI, deserves further investigation.     

Age and race impact the association between BMI and CVD mortality in women

OBJECTIVES: In previous studies, we have shown that obesity is associated with increased cardiovascular disease (CVD) mortality in white women but not in black women. Earlier research suggests that body mass index (BMI) has a greater effect on CVD mortality in younger white females than older white females, whereas this relationship in black women is not as clear. This study examines the effect of age on the association of BMI to CVD in black and white women. METHODS: The Black Pooling Project includes data on 2,843 black women with 50,464 person-years of follow-up, and 12,739 white women with 214,606 person-years of follow-up. A Cox proportional hazards model was used to examine the association between BMI and CVD mortality for specific age/race groups. The younger group was < 60 years of age and the older group was > 60 years of age. RESULTS: In younger white women, the relative risk (95% confidence interval [CI]) for CVD mortality was significant in obese women (BMI > 30 kg/m2) vs. women of normal weight (BMI 18.5-24.9 kg/m2) (1.59 [CI 1.20, 2.09]). Similarly, in older white women, the relative risk for CVD mortality in obese women vs. women of normal weight was significant (1.21 [CI 1.04, 1.41]). There were no such associations for black women. Overweight (BMI 25-29.9 kg/m2) was not associated with increased risk in black or white women. CONCLUSION: These findings indicate that obesity is associated with a significantly greater risk of CVD mortality among white women, with the strongest association among white women < 60 years of age.     

Relationship of BMI, waist circumference, and weight change with use of health services by older adults

OBJECTIVE: To examine the relationship of BMI, waist circumference (WC), and weight change with use of health care services by older adults. RESEARCH METHODS AND PROCEDURES: This was a prospective cohort study conducted from 2001 to 2003 among 2919 persons representative of the non-institutionalized Spanish population > or =60 years of age. Analyses were performed using logistic regression, with adjustment for age, educational level, size of place of residence, tobacco use, alcohol consumption, and presence of chronic disease. RESULTS: Obesity (BMI > or = 30 kg/m(2)) and abdominal obesity (WC >102 cm in men and >88 cm in women) in 2001 were associated with greater use of certain health care services among men and women in the period 2001-2003. Compared with women with WC < or = 88 cm, women with abdominal obesity were more likely to visit primary care physicians [odds ratio (OR): 1.36; 95% confidence limit (CL): 1.06-1.73] and receive influenza vaccination (OR: 1.30; 95% CL: 1.03-1.63). Weight gain was not associated with greater health service use by either sex, regardless of baseline BMI. Weight loss was associated with greater health service use by obese and non-obese subjects of both sexes. In comparison with those who reported no important weight change, non-obese women who lost weight were more likely to visit hospital specialists (OR: 1.45; 95% CL: 1.02-2.06), receive home medical visits (OR: 1.61; 95% CL: 1.06-2.45), be hospitalized (OR: 1.88; 95% CL: 1.29-2.74), and have more than one hospital admission (OR: 2.31; 95% CL: 1.19-4.47). DISCUSSION: Obesity and weight loss are associated with greater health service use among the elderly.     

孕前体质指数、孕期增重与婴幼儿血红蛋白的关系

目的 探讨孕前体质指数（body mass index,BMI）、孕期增重与婴幼儿血红蛋白的关系。方法 选择按期体检与分娩的孕妇及婴儿作为研究对象,孕妇一般情况及分娩情况将由问卷调查的方式收集。并采用单因素分析和多因素Logistic回归模型进行数据分析。结果 受检对象共980例,按孕前BMI分组,孕前消瘦者占19.0%,孕前体重正常者占71.0%,孕前超重肥胖者占10.0%。孕期增重按美国国家科学院（institute of medicine,IOM）标准分组,孕期增重低于IOM推荐标准者占27.8%,符合IOM推荐标准者占31.4%,高于IOM推荐标准者占40.8%。贫血发生率为49.7%。单因素分析中孕前BMI、孕期增重对贫血均有统计学意义（均有P<0.05）。同时多因素分析显示,孕前消瘦者（OR=2.027,95%CI:1.433～2.867）,孕期增重不足者（OR=2.499,95%CI:1.772～3.523）是婴幼儿贫血的危险因素。结论 孕前BMI、孕期增重情况可能是婴幼儿贫血的危险因素,控制孕前BMI、孕期增重情况可以有效降低贫血的发生风险。     

孕前体重指数及孕期增重对围生结局的影响

目的 分析孕前体重指数(BMI)及孕期体重增长对围生结局的影响,为孕期保健、孕前和孕期体重管理提供依据。方法 采用历史性队列研究方法,将深圳市龙岗区2014-2017年26家助产医院95 849例单胎足月产妇按孕前BMI及孕期增重情况分组,观察各组围生结局。结果 95 849例孕妇平均孕前BMI为(20.49±2.83) kg/m²,平均孕期增重(14.49±5.89) kg。相比孕前正常BMI 和孕期增重适宜的孕妇,孕前消瘦(BMI<18.5kg/m²)和孕期增重不足是低出生体重儿发生的危险因素,OR值(95%CI)分别为1.80(1.61~2.00)、1.83(1.63~2.05);孕前超重(BMI≥24 kg/m²)是妊娠期糖尿病(GDM)、妊娠期高血压、子痫前期/子痫、巨大儿、剖宫产、出生窒息发生的危险因素,OR值(95%CI)分别为1.84(1.68~2.02)、2.40(1.90~3.04)、3.07(2.39~3.96)、2.70(2.49~2.92)、1.89(1.81~1.97)及1.33(1.05~1.67);孕期增重过度是巨大儿、剖宫产、妊娠期高血压、子痫前期/子痫、胎膜早破、产后出血发生的危险因素,OR值(95%CI)分别为2.59(2.40~2.79)、1.45(1.40~1.50)、2.83(2.21~3.62)、2.18(1.69~2.81)、1.26(1.13~1.40)及1.26(1.07~1.48)。结论 孕前BMI和孕期增重均是剖宫产、妊娠期高血压、子痫前期/子痫、低出生体重和巨大儿发生的影响因素,因此将孕前BMI、孕期增重控制在合理范围有利于获得良好的围生结局。