Risk,Efficacy, and Seeking of General,Breast, and Prostate Cancer Information

The authors investigated the independent and interactive effects of perceived risk and perceived efficacy on seeking of general, breast, and prostate cancer information. Analysis of the 2003 Health Information National Trend Survey indicates that perceived absolute risk and perceived response efficacy have generally independent—rather than interactive—effects on cancer information seeking. The influence of perceived absolute risk on prostate cancer information seeking appears to be moderated by perceived relative risk. When perceived relative risk is low, perceived absolute risk has no effect on prostate cancer information seeking; when perceived relative risk is high, perceived absolute risk exerts a significant positive influence on prostate cancer information seeking. The authors discuss the theoretical and practical implications.     

Predictors of perceived risk for colon cancer in a national probability sample in the United States

This study examines potential predictors of perceived risk for colon cancer in a U.S. sample of 2,949 individuals aged 45 and older with no colon cancer history. We examined perceived comparative risk for colon cancer as the outcome in ordinal regression analyses, and perceived absolute risk for colon cancer in linear regression analyses. Potential predictors included demographics, current risk behaviors, self-reported health, family and personal cancer history, emotion variables (colon cancer worry, general anxiety, and fear of positive screening findings), general cancer beliefs (causes, lack of preventability, information overload), and cancer information seeking. Those who had poorer self-reported health, a family cancer history, and increased colon cancer worry had higher perceived comparative and absolute colon cancer risk (all ps < .05). Those who were younger, interviewed in Spanish, had increased anxiety, and information overload had higher comparative risk; those with a personal history of cancer and fear that colon cancer screening would result in positive findings had higher absolute risk (all ps < .05). We determined that older individuals, those with risk factors, and those with good subjective health may not realize their colon cancer risk. Those distressed about colon cancer and who report cancer prevention information overload may require different messages.     

Understanding Health Information Seeking: A Test of the Risk Perception Attitude Framework

The authors used the Risk Perception Attitude framework, which is grounded in the Extended Parallel Process Model, to predict people's intentions to seek health information. In an online survey, 689 participants recruited from a crowdsource website were queried about their anticipated health information seeking, perceived risk, and efficacy in response to four scenarios pertaining to hypertension, hypercholesterolemia, alcohol dependence, and diabetes. Each participant was categorized for each scenario as responsive (higher risk, higher efficacy), avoidant (higher risk, lower efficacy), proactive (lower risk, higher efficacy), or indifferent (lower risk, lower efficacy). As predicted, responsive individuals were more likely to seek information than avoidant individuals, but only in three of the four scenarios. Also as expected, there was no difference between proactive and indifferent individuals’ likelihood of seeking health information for any scenario. Risk and efficacy, while significant predictors of anticipated health information seeking, left much of the variance unexplained. An analysis of the reasons for information seeking and nonseeking among nonconforming cases suggests that a wider range of influences on health information seeking should be investigated, including curiosity, prior knowledge, social expectations, and situational norms.     

Effects of Numerical Versus Foreground-Only Icon Displays on Understanding of Risk Magnitudes

The aim of this work is to advance knowledge of how to measure gist and verbatim understanding of risk magnitude information and to apply this knowledge to address whether graphics that focus on the number of people affected (the numerator of the risk ratio, i.e., the foreground) are effective displays for increasing (a) understanding of absolute and relative risk magnitudes and (b) risk avoidance. In 2 experiments, the authors examined the effects of a graphical display that used icons to represent the foreground information on measures of understanding (Experiments 1 and 2) and on perceived risk, affect, and risk aversion (Experiment 2). Consistent with prior findings, this foreground-only graphical display increased perceived risk and risk aversion; however, it also led to decreased understanding of absolute (although not relative) risk magnitudes. Methodologically, this work shows the importance of distinguishing understanding of absolute risk from understanding of relative risk magnitudes, and the need to assess gist knowledge of both types of risk. Substantively, this work shows that although using foreground-only graphical displays is an appealing risk communication strategy to increase risk aversion, doing so comes at the cost of decreased understanding of absolute risk magnitudes.     

Weaving Meanings Together in an AIDS Residence: Communicative Practices,Perceived Health Outcomes,and the Symbolic Construction of Community

Members of a health maintenance organization (N = 353) interacted with a computer program that provided personalized information about their risk of developing colon cancer in the next 20 years. Prior to computer feedback, most people greatly overestimated their numerical, absolute risk (chances per 1000) and also overestimated their relative risk compared to peers (e.g., “above average”). Their relative risk estimates were correlated with several risk factors, whereas their absolute risk estimates were not, suggesting that assessing individual risk perceptions with numerical, absolute risk scales may provide misleading information about what people believe. Computer feedback improved the accuracy of mean risk estimates, but about half of participants did not accept the personalized feedback as correct. In fact, correlations between actual and perceived risk were no greater among participants who received risk scores than among those who did not. Three possible explanations for resistance to lower-than-expected risk feedback are considered.     

Psychosocial Determinants of Cancer-Related Information Seeking Among Cancer Patients

This study explores the utility of using the Integrative Model of Behavioral Prediction as a framework for predicting cancer patients' intentions to seek information about their cancer from sources other than a physician, and to examine the relation between patients' baseline intentions to seek information and their actual seeking behavior at follow-up. Within 1 year of their diagnosis with colon, breast, or prostate cancer, 1,641 patients responded to a mailed questionnaire assessing intentions to seek cancer-related information from a source other than their doctor, as well as their attitudes, perceived normative pressure, and perceived behavioral control with respect to this behavior. In addition, the survey assessed their cancer-related information seeking. One year later, 1,049 of these patients responded to a follow-up survey assessing cancer-related information seeking during the previous year. Attitudes, perceived normative pressure, and perceived behavioral control were predictive of information-seeking intentions, although attitudes emerged as the primary predictor. Intentions to seek information, perceived normative pressure regarding information seeking, baseline information-seeking behavior, and being diagnosed with stage 4 cancer were predictive of actual information-seeking behavior at follow-up. Practical implications are discussed.     

Psychosocial determinants of cancer-related information seeking among cancer patients

This study explores the utility of using the Integrative Model of Behavioral Prediction as a framework for predicting cancer patients' intentions to seek information about their cancer from sources other than a physician, and to examine the relation between patients' baseline intentions to seek information and their actual seeking behavior at follow-up. Within 1 year of their diagnosis with colon, breast, or prostate cancer, 1,641 patients responded to a mailed questionnaire assessing intentions to seek cancer-related information from a source other than their doctor, as well as their attitudes, perceived normative pressure, and perceived behavioral control with respect to this behavior. In addition, the survey assessed their cancer-related information seeking. One year later, 1,049 of these patients responded to a follow-up survey assessing cancer-related information seeking during the previous year. Attitudes, perceived normative pressure, and perceived behavioral control were predictive of information-seeking intentions, although attitudes emerged as the primary predictor. Intentions to seek information, perceived normative pressure regarding information seeking, baseline information-seeking behavior, and being diagnosed with stage 4 cancer were predictive of actual information-seeking behavior at follow-up. Practical implications are discussed.     

Cancer information scanning and seeking behavior is associated with knowledge, lifestyle choices, and screening

Previous research on cancer information focused on active seeking, neglecting information gathered through routine media use or conversation ("scanning"). It is hypothesized that both scanning and active seeking influence knowledge, prevention, and screening decisions. This study uses Health Information National Trends Survey (HINTS, 2003) data to describe cancer-related scanning and seeking behavior (SSB) and assess its relationship with knowledge, lifestyle behavior, and screening. Scanning was operationalized as the amount of attention paid to health topics, and seeking was defined as looking for cancer information in the past year. The resulting typology included 41% low-scan/no-seekers; 30% high-scan/no-seekers; 10% low-scan/seekers, and 19% high-scan/seekers. Both scanning and seeking were significantly associated with knowledge about cancer (B=.36; B=.34) and lifestyle choices that may prevent cancer (B=.15; B=.16) in multivariate analyses. Both scanning and seeking were associated with colonoscopy (OR = 1.38, for scanning and OR=1.44, for seeking) and with prostate cancer screening (OR=4.53, scanning; OR=10.01, seeking). Scanning was significantly associated with recent mammography (OR=1.46), but seeking was not. Individuals who scan or seek cancer information are those who acquire knowledge, adopt healthy lifestyle behaviors, and get screened for cancer. Causal claims about these associations await further research.     

Information seeking and satisfaction with physician-patient communication among prostate cancer survivors

Relatively little is known about prostate cancer patients' information seeking after diagnosis, how they use such information in making a treatment decision, or what role information plays in adjusting to quality-of-life issues posttreatment. This research sought to explore some of these issues by examining prostate cancer patients' information seeking and its relationship to assessments of feeling informed and satisfied with physician-patient communication about prostate cancer. Respondents felt reasonably informed about prostate cancer, although over one third of them reported being less then informed. Similarly, many respondents were generally satisfied with their communication with physicians, but nearly 40% of them reported being less than satisfied. However, there was no relationship between respondents' information seeking about prostate cancer and their assessments of being informed or satisfied with physician-patient communication. These and other results are discussed with respect to future research on prostate cancer patients' information needs and uses of such information.     

Vasectomy and prostate cancer risk

To assess the hypothesis that a history of vasectomy is a risk factor in the etiology of prostate cancer, the authors conducted a case-control study at Roswell Park Memorial Institute, Buffalo, NY, between 1982 and 1988. From epidemiologic data routinely collected from entering patients, information on vasectomy history and other data were obtained for 614 patients with prostate cancer and 2,588 comparable control subjects with cancer at another site. Age-specific and age-adjusted relative risks were calculated. Increased risk (relative risk = 1.7, 95% confidence interval 1.1-2.6) was found for reporting vasectomy at any age. Age-adjusted relative risk of 2.2 (95% confidence interval 1.0-4.6) was observed for men who reported vasectomy 13-18 years before diagnosis. A significant trend in the association of years since vasectomy and risk also was observed. Cases and controls were found to be nearly identical with respect to education, income, race, marital history, and number of children. A difference in smoking histories of cases and controls was found not to confound the observed associations. These data may suggest the importance of further epidemiologic and biologic research on vasectomy as a risk factor for prostate cancer.     

Risk perceptions and worry about cancer: does gender make a difference?

Risk perceptions and worry are important constructs in many theoretical frameworks used to develop cancer screening interventions. Because most cancers for which we have early detection or prevention strategies are gender specific, few investigations have examined gender differences. We examined gender differences in the magnitude of, and associations with, perceived risk and worry by cancer type. Our sample included 939 men and 1,580 women >or= 50 years old with no history of relevant cancers from the 2003 Health Information National Trends Survey (HINTS). Dependent variables included absolute and comparative perceived risk and worry for gender-specific (breast/prostate) and colon cancers. We examined demographics, health status, health behaviors, cancer beliefs, and cancer communication variables as correlates. Linear regression analyses and pairwise contrasts were conducted with SUDAAN. Men reported greater comparative perceived risk for developing cancers, whereas women reported more frequent cancer worry. For both genders, perceived risk and worry were lowest for colon cancer. Correlates of perceived risk and worry varied, and several associations were moderated by gender. Different risk messages and intervention strategies may be needed to influence males' and females' perceived cancer risk and worry. All effect sizes were small, and future prospective research is needed to confirm our findings.     

The metabolic syndrome is associated with reduced risk of prostate cancer

Diabetes is associated with reduced risk of prostate cancer, but whether the metabolic syndrome is associated with prostate cancer is not established. The authors assessed this association in the Atherosclerosis Risk in Communities (ARIC) Study, comprising 6,429 men in four US communities initially with no history of cancer and aged 45-64 years. Metabolic syndrome and other risk factors were assessed in 1987-1989. Follow-up for prostate cancer incidence (n = 385 through 2000) was accomplished through cancer registry and hospital linkage. At baseline, 1,871 men (29.5%) had the metabolic syndrome. After the authors adjusted for other risk factors, men with the metabolic syndrome (> or =3 components) were significantly less likely to develop prostate cancer (relative risk = 0.77, 95% confidence interval: 0.60, 0.98) than men without the metabolic syndrome. Diabetes was negatively associated with prostate cancer, although the confidence interval included 1 (relative risk = 0.73, 95% confidence interval: 0.51, 1.05). When diabetic participants were excluded, the inverse association between metabolic syndrome and prostate cancer incidence was slightly strengthened. In this study, the metabolic syndrome was associated with decreased prostate cancer incidence. The authors hypothesize that this finding reflects a decrease in bioavailable (free and albumin-bound) testosterone with the metabolic syndrome and a concomitant reduction in prostate cancer risk.     

Targeting Perceptions of Risk from Injudicious Antibiotic Use: An Application of the Risk Information Seeking and Processing Model

Enhancing knowledge about antibiotic-associated risks is key to reducing injudicious antibiotic use and slowing antibiotic resistance. Using the Risk Information Seeking and Processing (RISP) model, the study identified predictors of individuals’ seeking and avoidance of information about antibiotic risks and tested the effectiveness of exposure to a RISP-informed video intervention against exposure to a CDC-produced video and a control group. In a national sample (N = 1000), risk judgment led to greater negative affect toward risks of antibiotics and lower positive affect toward antibiotic usefulness. In turn, positive and negative affect shaped information insufficiency, which interacted with perceived information gathering capacity to influence risk information seeking and avoidance. In addition, informational subjective norms and affective responses directly shaped individuals’ information behavior. Results showed that relative to the control group, participants viewing the RISP-informed video had greater risk judgment, perceived current knowledge about antibiotic risks, perceived information gathering capacity, and informational subjective norms, as well as lower levels of positive affect toward antibiotics. The RISP-informed video and CDC-produced video performed equivalently well. Implications of the findings for the design of antibiotic stewardship messages are discussed     

Colon cancer: risk perceptions and risk communication

Members of a health maintenance organization (N=353) interacted with a computer program that provided personalized information about their risk of developing colon cancer in the next 20 years. Prior to computer feedback, most people greatly overestimated their numerical, absolute risk (chances per 1000) and also overestimated their relative risk compared to peers (e.g., "above average"). Their relative risk estimates were correlated with several risk factors, whereas their absolute risk estimates were not, suggesting that assessing individual risk perceptions with numerical, absolute risk scales may provide misleading information about what people believe. Computer feedback improved the accuracy of mean risk estimates, but about half of participants did not accept the personalized feedback as correct. In fact, correlations between actual and perceived risk were no greater among participants who received risk scores than among those who did not. Three possible explanations for resistance to lower-than-expected risk feedback are considered.     

Calcium, dairy foods, and risk of incident and fatal prostate cancer: the NIH-AARP Diet and Health Study

Calcium and dairy foods in relation to prostate cancer were examined in the National Institutes of Health (NIH)-AARP (formerly known as the American Association of Retired Persons) Diet and Health Study (1995/1996-2001). Diet was assessed with a food frequency questionnaire at baseline. Multivariate relative risks and 95% confidence intervals were estimated by Cox regression. During up to 6 years of follow-up (n = 293,888), the authors identified 10,180 total prostate cancer cases (8,754 nonadvanced, 1,426 advanced, and 178 fatal cases). Total and supplemental calcium were unrelated to total and nonadvanced prostate cancer. However, a statistically nonsignificant positive association with total calcium was observed for advanced (> or = 2,000 vs. 500-<750 mg/day: relative risk (RR) = 1.25, 95% confidence interval (CI): 0.91, 1.71; p(trend) = 0.06) and fatal (> or = 1,000 vs. 500-<750 mg/day: RR = 1.39, 95% CI: 0.92, 2.09; p(trend) = 0.10) prostate cancer. Skim milk, but not other dairy foods, was associated with increased risk of advanced prostate cancer (> or = 2 vs. zero servings/day: RR = 1.23, 95% CI: 0.99, 1.54; p(trend) = 0.01). In contrast, calcium from nondairy foods was associated with lower risk of nonadvanced prostate cancer (> or = 600 vs. < 250 mg/day: RR = 0.82, 95% CI: 0.68, 0.99; p(trend) = 0.04). Although the authors cannot definitively rule out a weak association for aggressive prostate cancer, their findings do not provide strong support for the hypothesis that calcium and dairy foods increase prostate cancer risk.     

Diet, obesity, and risk of fatal prostate cancer

Findings described in this report are for 6,763 white male Seventh-day Adventists who completed a dietary questionnaire in 1960. Between 1960 and 1980 mortality data were collected on cohort members. Overweight men had a significantly higher risk of fatal prostate cancer than men near their desirable weight. The predicted relative risk of fatal prostate cancer was 2.5 for overweight men. Suggestive positive associations were also seen between fatal prostate cancer and the consumption of milk, cheese, eggs, and meat. There was an orderly dose-response between each of the four animal products and risk. The predicted relative risk of fatal prostate cancer was 3.6 for those who heavily consumed all four animal products. The results of this study and others suggest that animal product consumption and obesity may be risk factors for fatal prostate cancer.     

Diabetes and risk of prostate cancer in a prospective cohort of US men

One previous study has suggested that diabetes may decrease risk of prostate cancer but only several years after diagnosis of diabetes. The authors examined the role of timing of diabetes diagnosis in relation to risk of prostate cancer among men in the Cancer Prevention Study II Nutrition Cohort. Participants in the study completed a mailed questionnaire including information on diabetes at enrollment in 1992 and at follow-up questionnaires in 1997 and 1999. Historical information on diabetes was also available from a previous study in 1982. The authors documented 5,318 cases of incident prostate cancer through August 31, 2001, among 72,670 men. Results from Cox proportional hazards models showed that diabetes was associated with a lower incidence of prostate cancer (rate ratio (RR) = 0.67, 95% confidence interval (CI): 0.60, 0.75). This association differed significantly by time since diagnosis of diabetes (p < 0.0002); risk of prostate cancer was slightly increased during the first 3 years after diagnosis of diabetes (RR = 1.23, 95% CI: 0.92, 1.65) but was reduced among men diagnosed 4 or more years before (RR = 0.63, 95% CI: 0.56, 0.71). Study results are consistent with the hypothesis that diabetes is associated with reduced risk of prostate cancer but only several years after diagnosis of diabetes.     

Information Seeking and Satisfaction With Physician–Patient Communication Among Prostate Cancer Survivors

Relatively little is known about prostate cancer patients' information seeking after diagnosis, how they use such information in making a treatment decision, or what role information plays in adjusting to quality-of-life issues posttreatment. This research sought to explore some of these issues by examining prostate cancer patients' information seeking and its relationship to assessments of feeling informed and satisfied with physician–patient communication about prostate cancer. Respondents felt reasonably informed about prostate cancer, although over one third of them reported being less then informed. Similarly, many respondents were generally satisfied with their communication with physicians, but nearly 40% of them reported being less than satisfied. However, there was no relationship between respondents' information seeking about prostate cancer and their assessments of being informed or satisfied with physician–patient communication. These and other results are discussed with respect to future research on prostate cancer patients' information needs and uses of such information.     

Peer Reviewed: Cancer Risk Communication in Mainstream and Ethnic Newspapers

Introduction

We wanted to understand how cancer risks are communicated in mainstream and ethnic newspapers, to determine whether the 2 kinds of newspapers differ and to examine features of news stories and sources that might predict optimal risk communication.

Methods

Optimal risk communication was defined as presenting the combination of absolute risk, relative risk, and prevention response efficacy information. We collected data by conducting a content analysis of cancer news coverage from 2003 (5,327 stories in major newspapers, 565 stories in ethnic newspapers). Comparisons of mainstream and ethnic newspapers were conducted by using cross-tabulations and Pearson χ² tests for significance. Logistic regression equations were computed to calculate odds ratios and 95% confidence intervals for optimal risk communication.

Results

In both kinds of newspapers, cancer risks were rarely communicated numerically. When numeric presentations of cancer risks were used, only 26.2% of mainstream and 29.5% of ethnic newspaper stories provided estimates of both absolute and relative risk. For both kinds of papers, only 19% of news stories presented risk communication optimally. Cancer risks were more likely to be communicated optimally if they focused on prostate cancer, were reports of new research, or discussed medical or demographic risks.

Conclusion

Research is needed to understand how these nonnumeric and decontextualized presentations of risk might contribute to inaccurate risk perceptions among news consumers.     

Fatalistic Cancer Beliefs and Information Seeking in Formerly Incarcerated African-American and Hispanic Men: Implications for Cancer Health Communication and Research

African-American and Hispanic men are disproportionately affected by cancer experiencing higher rates of cancer-related morbidity and mortality for many cancers (but not all). These challenges may be magnified for a subpopulation of African-American and Hispanic men who have been incarcerated. A survey assessing demographics, incarceration experience, psychosocial, behavioral, and cancer health information seeking was administered to 230 previously incarcerated men aged 35 years and older. Data analysis was performed to assess the association between fatalism, perceived susceptibility, and health information seeking in this population. This study revealed the following: the majority of the participants (68.7%) held the fatalistic belief: “When I think of cancer, I automatically think of death.” Second, the fatalistic belief, “There’s not much you can do to lower your chances of getting cancer,” is more prevalent among those who perceived a higher risk of developing cancer. Third, older participants (those between 55 and 70 years old) and widowed are less likely to think of death when they think of cancer. In addition, those who use the Internet to look for health or medical information (i.e., engaging in health information seeking) are less likely to agree with the fatalistic belief: “It seems like everything causes cancer.” Given the high incidence of certain cancers among African-American and Hispanic men and the vulnerability of those involved in the criminal justice system, our findings highlight the importance of understanding perceived susceptibility to cancer, fatalistic beliefs about cancer, and information seeking in formerly incarcerated men.