[Psychological factors of adopting and maintaining physical activity for individuals with hypertension in a community].

Objective: To examine the impact of psychosocial factors on physical activity, so as to provide guidance for the development of an effective physical activity intervention program for individuals with hypertension.

Methods: This study used a baseline data from an intervention study on regular physical activity among hypertensive individuals. A multi-stage, stratified random sampling was utilized and finally 12 communities from 6 urban districts were chosen.

Time trends and age-period-cohort analyses on incidence rates of nasopharyngeal carcinoma during 1993-2007 in Wuhan, China.

Background: Declines in incidence rates of nasopharyngeal carcinoma (NPC) were observed in Hong Kong and Taiwan but not other high-risk regions in China, while evidences from low-risk regions in China are still lacking. This study aimed to examine the time trends (1993-2007) of NPC in Wuhan (a low-risk region) and assess the birth cohort and calendar period effects on the observed temporal trends.

Method: Using data from Wuhan Cancer Registry, age-standardized annual incidence rates of NPC were calculated by the direct method using the WHO World Standard Population (2000) as the reference.