Analysis of secular trend of lung cancer mortality rate in Kunshan City, 1981-2005.

Objective To evaluate the secular trend of lung cancer mortality rate during 1981 to 2005 in Kunshan City. Methods The population-based registration data collected during the period of 1981—2005 were used to calculate the crude rate (CR), world age-standardized rate (WASR), five-year age-specific rate, truncated rate of those aged 35~64, cumulative rates of those aged 0~74, percent change (PC), and annual percent change (APC). The mortality rates by age, period/age, and cohort / age were analyzed and compared. Results The CR was 27. 88 per 100 000 on average, and was 43.19 per 100 000 for males and 12.56 per 100 000 for females, with a sex ratio of 3. 43: 1. The WASR was 22.52 per 100 000 on average, and 37.28 per 100 000 for males and 9.67 per 100 000 for the females. The truncated rate and cumulative rate of those aged 0~74 were 31.54 per 100 000 and 0.10% respectively. The PC and the APC were 144.56% and 4.08% for the crude mortality rate, and 23.57% and 1.01% for the age-standardized rate. Birth cohort and period data analysis showed rising of lung cancer of age-specific rate. Conclusion The mortality data demonstrated a rising trend in general in the period of 1981—2005 in Kunshan.