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It has been hypothesized that environmental factors influence sex differentiation in the fetus, thus causing a reduced sex ratio (male/female) at birth, an increase in the prevalence of ambiguous-sex infants, and possibly an increase in spontaneous abortion rates. In Norway, subsequent to 1967, all deliveries, including late abortions after 16 wk of gestation, have been reported to the Medical Birth Registry of Norway. The authors used these data to assess birth-weight-specific secular trends of uncertain-sex infants and the proportion of male births, from 1967 through 1998. Total rates of uncertain-sex infants increased from 2.3/10,000 births in 1967 to 8.0/10,000 births in 1998 in the birth weight strata of less than 600 gm. The total proportion of male births was stable; however, there was a reduction in the proportion of male births among births weighing less than 400 gm—from 58.4% to 53.4%. Incomplete ascertainment of abortions may have biased the results, but it would not have accounted for the increased occurrence of uncertain-sex infants and the decreased proportion of males observed among late-term abortions.  相似文献   

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Because syphilis infection facilitates acquisition and transmission of human immunodeficiency virus (HIV), recent outbreaks of syphilis among men who have sex with men (MSM) in major U.S. cities, including San Francisco and Los Angeles, and reported increases in sexual risk behavior have raised concerns about potential increases in HIV transmission. In 2002, MSM accounted for the majority of primary and secondary (P&S) syphilis cases in men reported in San Francisco (93%) and Los Angeles (81%). To investigate a potential change in HIV incidence associated with the syphilis outbreaks in the two cities, local, state, and federal health officials analyzed data from HIV counseling and testing centers and a municipal sexually transmitted disease (STD) clinic. This report describes the results of that investigation, which indicated that, as of 2002, the outbreaks of syphilis had not had a substantial impact on HIV incidence among MSM in these two cities. However, the continued increase in syphilis cases in MSM underscores the need for integrated HIV- and STD-prevention strategies to control syphilis outbreaks and prevent potential increases in HIV infections (6,7) and for further systematic studies of HIV incidence among MSM infected with syphilis.  相似文献   

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Background and Objective:

We conducted this study to evaluate and compare postpartum sexual functioning after vaginal and caesarean births.

Materials and Methods:

This was a cross-sectional study that was carried out in postnatal health care in a hospital. A total of 50 primiprous women who had given birth 6-12 months ago and came to the hospital for postnatal care were asked to join the study. Forty of the women completed the entire questionnaire. Among these women, 20 delivered spontaneously with mediolateral episiotomy and 20 had elective caesarean section. Sexual function was evaluated by a validated, self-created questionnaire. A statistical evaluation was carried out by SPSS v.11. A two-part self-created validated questionnaire for data collection was administered regarding sexual function prior to pregnancy and 6-12 months postpartum.

Results:

The median time to restart intercourse in the normal vaginal delivery with episiotomy (NVD/epi) group was 40 days and in the caesarean section (C/S) group was 10 days postpartum. The most common problems in the NVD/epi group was decreased libido (80%), sexual dissatisfaction (65%), and vaginal looseness (55%). In the C/S group, the most common problems were vaginal dryness (85%), sexual dissatisfaction (60%), and decreased libido (35%). There were clinically significant differences between the two groups regarding sexual outcomes, but these differences were not statically significant.

Conclusion:

Postnatal sexual problems were very common after both NVD/epi and C/S. Because sexual problems are so prevalent during the postpartum period, clinicians should draw more attention to the women''s sexual life and try to improve their quality of life after delivery.  相似文献   

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Black women have the highest incidence of preterm birth (PTB). Upstream factors, including neighborhood context, may be key drivers of this increased risk. This study assessed the relationship between neighborhood quality, defined by the Healthy Places Index, and PTB among Black women who lived in Oakland, California, and gave birth between 2007 and 2011 (N = 5418 women, N = 107 census tracts). We found that, compared with those living in lower quality neighborhoods, women living in higher quality neighborhoods had 20–38% lower risk of PTB, independent of confounders. Findings have implications for place-based research and interventions to address racial inequities in PTB.Supplementary InformationThe online version contains supplementary material available at 10.1007/s11524-022-00624-8.  相似文献   

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CONTEXT: Few studies have systematically examined the experience of rural practice from the physician's perspective or included physicians from an array of specialties, particularly non-primary care. PURPOSE: To better understand differences between rural and urban physicians in perceptions of their practice environment. METHODS: In 2001-2002, self-administered questionnaires were sent to a probability sample of primary care and specialist physicians identified from the American Medical Association's Physician masterfile in California. Logistic regression was performed to model the effect practice location had on key variables, controlling for physician demographics, specialty, and the insurance profile of the physician's patients. FINDINGS: Completed questionnaires were obtained from 1,365 of 2,240 eligible urban physicians (61%), and 398 of 632 rural physicians (63%). Among primary care physicians, those in rural areas defined as nonadjacent or small non-metropolitan counties were the least likely to report pressures to see more patients, limit referrals, and limit treatment options. In contrast, among specialists, those in rural areas within metropolitan areas (or in large adjacent non-metropolitan counties) were more likely than urban specialists to report practice pressures. Although rural physicians in both primary care and specialist fields were more likely than urban physicians to report difficulty attracting new physicians to their communities, they perceived their overall practice climate to be better. Physicians in the nonadjacent-or-small non-metropolitan category were the most satisfied, but specialists in the nonadjacent-or-small non-metropolitan category were the least satisfied. CONCLUSION: Physicians in rural California appear to have maintained a greater sense of clinical autonomy and higher professional satisfaction compared with their urban counterparts.  相似文献   

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Objective is to examine the effect of epidural analgesia in first stage of labor on occurrence of cesarean and operative vaginal deliveries in nulliparous women and multiparous women without a previous cesarean delivery. Design of the Prospective cohort study. Prenatal care was received at 12 free-standing health centers, 7 private physician offices, or 2 hospital-based clinics; babies were delivered at a free standing birth center or at 3 hospitals, all in San Diego, CA. This study of 2,052 women used data from the San Diego Birth Center Study that enrolled women between 1994 and 1996 to compare the birthing management of the collaborative Certified Nurse Midwife-Medical Doctor Model with that of the traditional Medical Doctor Model. Main Outcome Measures of the Cesarean or operative vaginal deliveries. After adjusting for differences between women who used and those who did not use epidural analgesia in 1st stage of labor, epidural use was associated with a 2.5 relative risk (95% CI: 1.8, 3.4) for operative vaginal delivery in nulliparous women, and a 5.9 relative risk (95% CI: 3.2, 11.1) in multiparous women. Epidural use was associated with a 2.4 relative risk (95% CI: 1.5, 3.7) for cesarean delivery in nulliparous women, and a 1.8 relative risk (95% CI: 0.6, 5.3) in multiparous women. Epidural anesthesia increases the risk for operative vaginal deliveries in both nulliparous and multiparous women, and increases risk for cesarean deliveries in nulliparous more so than in multiparous women.  相似文献   

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Objectives. This study sought to determine the effects of the California Tobacco Control Program on tobacco-related attitudes and behaviors.

Methods. In 1996 and 1998, a telephone survey was conducted among adults in randomly selected households in 18 California counties. Tenth-grade youths in 84 randomly selected high schools completed a written survey. In analyses conducted at the county level, differences in outcomes were regressed on an index of program exposure.

Results. Among adults, program exposure was associated with decreased smoking prevalence rates, increased no-smoking policies in homes, and decreased violations of workplace no-smoking policies. Among youths, there was no effect of program exposure on outcomes.

Conclusions. These results suggest that the California Tobacco Control Program may have reduced adult smoking prevalence rates and exposure to environmental tobacco smoke. (Am J Public Health. 2002;92:975–983)

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Between 1998-2002, 16,952 new cases of cancer were registered in Navarre. In men, the most frequently diagnosed cancers were in the following order: prostate, lung, colon and rectum, bladder and stomach, which accounted for 63.2%. In women, the sites were breast, colon and rectum, corpus uteri, stomach and ovary, which accounted for 57.6% of the cases. In the same period, 1998-2002, 4,127 men and 2,470 women died from cancer. Sixty percent of all deaths due to malign tumours in men were due to cancer of the lung, prostate, colon and rectum, stomach and bladder. In women this was due to cancers of colon and rectum, breast, stomach, pancreas and lung, which accounted for 49% of the cases. In men in Navarre there has been an increase in the incidence rates of cancer of the prostate, kidney and non-Hodgkin lymphoma. Avoidable cancers such as those related to smoking (lung, oral cavity and pharynx or pancreas) continue to rise, and represent a greater global risk of dying from cancer in the latest period studied than in the decades of the 1970s and 1980s. From 1995 up to the present, mortality due to cancer has moved from occupying the second place to become the first cause of death among men in Navarre. The global risk of death due to cancer in men is now equal to the first period studied, 1975-1977. Amongst women the global risk of death due to cancer fell by 25% between 1975 and 2002, basically at the cost of breast and stomach cancer. Tumours related to smoking increased both in mortality and in incidence and appear as a significant health problem amongst women in Navarre. Breast cancer has increased in incidence, with lower mortality figures than those of the first period 1975-1977. Invasive cancer of the cervix remains at very low rates in comparison with many European countries, including Spain. In both sexes colorectal and skin cancer has increased, while the incidence and mortality of stomach cancer continues to fall.  相似文献   

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