Update on mammography trends: comparisons of rates in 2000, 2005, and 2008.

BACKGROUND: Mammography screening allows for the early detection of breast cancer, which helps reduce mortality from breast cancer, especially in women aged 50 to 69 years. For this report, the authors updated a previous analysis of trends in mammography using newly available data from the National Health Interview Survey (NHIS). METHODS: NHIS data from 2008 were used to update trends in rates of US women who had a mammogram within the 2 years before their interview, and 2 methods of calculating rates were compared. The authors focused particularly on the 2000, 2005, and 2008 mammography rates for women aged ≥ 40 years, 40 to 49 years, 50 to 64 years, and ≥ 65 years according to selected sociodemographic and healthcare access characteristics. RESULTS: For women aged 50 to 64 years and ≥ 65 years, the patterns were similar: Rates rose rapidly from 1987 to 2000, declined, or were stable and then declined, from 2000 to 2005, and increased from 2005 to 2008. Rates for women aged 40 to 49 years rose rapidly from 1987 to 1992 and were relatively stable through 2008. There were large increases in mammography rates among immigrants who had been in the United States for <10 years, non-Hispanic Asian women, and women aged ≥ 65 years who were without ambulatory care insurance. CONCLUSIONS: Overall, mammography rates did not continue to decline between 2005 and 2008. Even so, in 2008, the percentage of women aged ≥ 40 years who had a recent mammogram fell below the Healthy People 2010 objective of 70%, which was met in 2000. However, women aged 50 to 64 years exceeded the Healthy People objective in 2000, 2005, and 2008; and some groups with very low mammography rates currently are catching up. These are important public health achievements.

Socioeconomic status and utilization of health care services in Canada and the United States: findings from a binational health survey.

OBJECTIVES: Building on Andersen's behavioral model for the utilization of health care services, we examined factors associated with utilization of physician and hospital services among adults in Canada and the United States, with a focus on socioeconomic status (enabling resources in Andersen's framework). METHODS: Using the 2002-2003 Joint Canada/United States Survey of Health, we conducted country-specific multivariate logistic regressions predicting doctor contacts/visits and overnight hospitalizations in the past year, controlling for predisposing characteristics, enabling resources, and several factors representing perceived need for health care. All analyses were appropriately weighted to yield nationally representative results. RESULTS: Several measures of socioeconomic status-having a regular medical doctor, education, and, in the US income and insurance coverage-were associated with doctor contacts or visits in both countries, along with various predisposing and need factors. However, these same measures were not associated with hospitalizations in either country. Instead, only the individual's predisposing characteristics (eg, age and sex) and his/her need for health care predicted utilization of hospital services in Canada and the United States. Insurance coverage status in the United States became a significant predictor of hospitalizations when count data were analyzed via Poisson regression. CONCLUSIONS: Given our particular outcome measures, adults in Canada and the United States exhibited similar patterns of hospital utilization, and socioeconomic status played no explanatory role. However, relative to Canadian adults, we found disparities in doctor contacts among US adults-between those with more income and those with less, between those with health insurance and those without-after adjusting for health care needs and predisposing characteristics.

Women's compliance with public health guidelines for mammograms and pap tests in Canada and the United States: an analysis of data from the Joint Canada/United States Survey Of Health.

OBJECTIVES: We use the Joint Canada/United States Survey of Health (JCUSH) to examine use of mammograms and Pap tests among Canadian and US women during 2002 and 2003. Unlike previous data, the JCUSH data are bi-nationally comparable, in that the same instrument was used for interviewing both Canadian and US respondents at the same time. Furthermore, when appropriately weighted, these data are representative of the populations of both countries. METHODS: Descriptive statistics were used to provide a basic profile of screening practices among women in Canada and the United States. Logistic regression was then used to examine the determinants of compliance with mammogram and Pap test guidelines in the 2 countries, statistically controlling for demographic and socioeconomic characteristics, health status, and other indicators suggested from previous research. To increase comparability, these analyses were restricted to the age ranges covered in common by the screening guidelines of both countries. RESULTS: Among women covered by the guidelines in both countries, screening rates were higher in the United States than in Canada at all ages, which is puzzling given the existence of Canada's universal health care system. Multivariate analyses revealed that whether a woman had had a mammogram within the last 2 years (when predicting last Pap test) or had had a Pap test within the last 3 years (when predicting last mammogram) were the strongest and most consistent predictors of compliance in both countries. Race/ethnicity, nativity, marital status, socioeconomic status, insurance coverage in the United States, and various health status indicators also predicted compliance in some, but not all, models.

Comparing health and health care use in Canada and the United States.

Results from the Joint Canada/United States Survey of Health (2002-2003) reveal that health status is relatively similar in the two countries, but income-related health disparities exist. Americans in the poorest income quintile are more likely to have poor health than their Canadian counterparts; there were no differences between the rich. In general, Canadians were more like insured Americans regarding access to services, and Canadians experienced fewer unmet needs overall. Despite higher U.S. levels of spending on health care, residents in the two countries have similar health status and access to care, although there are higher levels of inequality in the United States.

Combining estimates from complementary surveys: a case study using prevalence estimates from national health surveys of households and nursing homes.

OBJECTIVES: When a single survey does not cover a domain of interest, estimates from two or more complementary surveys can be combined to extend coverage. The purposes of this article are to discuss and demonstrate the benefits of combining estimates from complementary surveys and to provide a catalog of the analytic issues involved. METHODS: The authors present a case study in which data from the National Health Interview Survey and the National Nursing Home Survey were combined to obtain prevalence estimates for several chronic health conditions for the years 1985, 1995, and 1997. The combined prevalences were estimated by ratio estimation, and the associated variances were estimated by Taylor linearization. The survey weights, stratification, and clustering were reflected in the estimation procedures. RESULTS: In the case study, for the age group of 65 and older, the combined prevalence estimates for households and nursing homes are close to those for households alone. For the age group of 85 and older, however, the combined estimates are sometimes substantially different from the household estimates. Such differences are seen both for estimates within a single year and for estimates of trends across years. CONCLUSIONS: Several general issues regarding comparability arise when there is a goal of combining complementary survey data. As illustrated by this case study, combining estimates can be very useful for improving coverage and avoiding misleading conclusions.

Using the National Health Interview Survey: time trends in influenza vaccinations among targeted adults.

Context. Influenza and its complications result in significant morbidity and mortality each year. Certain groups are at increased risk for influenza and influenza-related complications. They, and others who are in close contact with them, are target groups to receive a yearly influenza immunization according to recommendations from the Advisory Committee on Immunization Practices (ACIP). Objective. To estimate the proportions of adults in selected target groups who received influenza vaccination in 1995 and 1998 and to identify characteristics associated with vaccination receipt. Data Source. The National Health Interview Survey (NHIS), a nationally representative survey of civilian noninstitutionalized persons conducted annually by the Centers for Disease Control's National Center for Health Statistics. We used data for adults (> 18 years of age) from the 1995 and 1998 NHIS. Outcome Measure. Proportions of persons in target groups self-reporting influenza vaccination in the 12 months before the NHIS interview. Results. Between 1995 and 1998, influenza vaccination increased for persons aged 65 and older (58.2% to 63.3%; P<0.05) and for adults under 65 belonging to selected ACIP target groups (27.5% to 30.1%; P<0.05). Examination of 1998 data shows that regardless of age, the likelihood of influenza vaccination is strongly influenced by having health coverage or a regular source of care. For example, 66% of the elderly with private fee- for-service health care coverage were vaccinated, compared with 23% of the elderly with no insurance (adjusted odds ratio [OR], 3.9; 95% CI, 1.6 to 9.3). For persons aged 18 to 64 years belonging to an ACIP target group, the corresponding figures are 32% vs. 16% (adjusted OR, 1.8; CI, 1.4 to 2.3). The likelihood of vaccination also varied by race and ethnicity: For age 65 and older, 66% of non-Hispanic whites were vaccinated compared with 46% of non-Hispanic blacks (adjusted OR, 2; CI, 1.6 to 2.4). Conclusions. The use of influenza vaccination among adults at high risk for influenza and influenza-related complications increased between 1995 and 1998. Younger individuals at high risk, people without insurance or a regular source of care, and nonwhites still have low vaccination rates.