Racial Differences in Age-Related Variations of Testosterone Levels Among US Males: Potential Implications for Prostate Cancer and Personalized Medication.

Aim: The magnitude of the age-related declines in testosterone rather than levels measured at single point in time may be related to the genesis of prostate cancer (PCa). We examined age-related variations of testosterone levels among black and white males, which may provide important insights into racial disparities in PCa incidence and mortality.

Method: We analyzed data from the 1999-2004 National Health and Nutritional Examination Survey to compare age-related variations in the testosterone levels of 355 black and 631 white males.

Status and determinants of individual actions to reduce health impacts of air pollution in US adults.

Although regulation of emissions is the primary strategy to reduce air pollution-related morbidity, individual-level interventions are also helpful in mitigating health impacts. We used data from 2007-2008 National Health and Nutrition Examination Survey to study the prevalence of individual-level action among the US adult population if informed of air pollution, and to see if this differed by demographic and health factors. Only 13.

Health effects of air pollution on length of respiratory cancer survival.

Background: Air pollution has been extensively and consistently linked with mortality. However, no study has investigated the health effects of air pollution on length of survival among diagnosed respiratory cancer patients.

Methods: In this study, we conducted a population-based study to investigate if air pollution exposure has adverse effects on survival time of respiratory cancer cases in Los Angeles (LA), CA and Honolulu, HI.

Association between ozone exposure and onset of stroke in Allegheny County, Pennsylvania, USA, 1994-2000.

Background: Epidemiological studies have shown adverse short-term effects of air pollution on health including cardiovascular morbidity and mortality. However, air pollution-related stroke has received less attention.

Methods: In this study, we performed a time-stratified case-crossover analysis to evaluate the relationships between stroke hospital admissions and O3, among patients aged 65 years and older in Allegheny County, Pa.