[Long-term trend of colorectal cancer survival rate in Qidong, 1972-2016]

Objective: The survival of colorectal cancer in Qidong City, Jiangsu Province from 1972 to 2016 was analyzed to provide a basis for the evaluation of prognosis and the formulation of prevention and control measures. Methods: Colorectal cancer data were obtained from the Qidong Cancer Registration and Reporting System, and the follow-up was up to December 31, 2021. The observed survival rate (OSR) and relative survival rate (RSR) were calculated by SURV 3.01 software, and the trend test was performed by Hakulinen's likelihood ratio test. The Joinpoint regression model was used to calculate the average annual percentage change (AAPC) of survival, and the ARIMA model was used to predict the trend of colorectal cancer survival. Results: There were 8 637 new cases of colorectal cancer in Qidong from 1972 to 2016. Dividing 1972-2016 into 9 periods at 5-year intervals, the 5-year OSR from 1972-1976 to 2012-2016 increased from 21.86% to 48.86%, and the 5-year RSR increased from 26.45% to 59.91%. The increasing trend of RSR was statistically significant (χ(2)=587.47, P<0.001). From 1972 to 2016, the survival rates of colorectal cancer in different sexes in Qidong were similar, and the 5-year RSR was 44.63% for men and 44.07% for women. Since the 1990s, the 5-year OSR and RSR for men have been lower than those for women. From 1972 to 2016, the 5-year RSR of colorectal cancer in Qidong was significantly improved in the 65-74 and ≥75-year-old groups, but the survival rate of the ≥75-year-old group was still the lowest (36.78%), followed by the 35-44-year-old group ( 43.04%). The time trend showed that the overall AAPC of colorectal cancer 5-year RSR in Qidong from 1972 to 2016 was 2.50% (t=16.45, P<0.001). The upward trend of different sexes was consistent, and the increase was greater in women (AAPC for males=2.18%, AAPC for females=2.54%, both P<0.05). The 5-year RSR of colorectal cancer in each age group showed an upward trend, and the AAPCs of the 35-44, 45-54, 55-64, 65-74, and ≥75-year-old groups were 1.54%, 1.83%, 2.00%, 3.51% and 4.35%, respectively (all P<0.05). The prediction results of colorectal cancer survival rate showed that the 5-year RSR of colorectal cancer in Qidong will increase to 71.62% by 2026. Conclusions: The overall survival rate of colorectal cancer patients in Qidong has been greatly improved, but there is still room for improvement. We should continue to pay attention to the early diagnosis and early treatment of colorectal cancer.

[Analysis on incidence and mortality of ovarian cancer in Jiangsu province, 2006-2015]

Objective: To estimate the incidence/mortality of ovarian cancer in 2015 and the incidence/mortality trend of ovarian cancer from 2006 to 2015 in Jiangsu province, and provide evidence for prevention and treatment of ovarian cancer in Jiangsu. Methods: The incidence and death data of cancer in Jiangsu from 2006 to 2015 collected from 35 cancer registries and verified by Jiangsu provincial CDC in 2018 were used for the extraction of ovarian cancer data. The data were stratified by urban and rural, gender and age groups. The crude rates of incidence and mortality, age-standardized incidence/mortality rates (ASIR/ASMR), cumulative incidence/mortality rates (0-74 years) and truncated incidence/mortality rates (35-64 years) of ovarian cancer were calculated. Chinese population census in 2000 and world Segi's standard population were used for the calculations of age-standardized incidence/mortality rates. Software Joinpoint 4.7.0.0 was used to analyze the annual percentage changes (APCs) of two rates from 2006 to 2015. Results: It was estimated that 2 229 ovarian cancer cases occurred in Jiangsu in 2015, accounting for 2.23% of all cancer cases and ranking 12(th) of cancer incidence in women. The crude incidence rate was 5.91/100 000, the age-standardized incidence rates by Chinese standard population (ASIRC) and by world standard population (ASIRW) were 4.01/100 000 and 3.81/100 000, respectively. The cumulative incidence rate (0-74 years) was 0.42%. It was estimated that 1 239 deaths of ovarian cancer occurred in Jiangsu in 2015, accounting for 2.18% of all cancer deaths and ranking 13(th) of cancer mortality in women. The crude mortality rate was 3.29/100 000, the ASMRC and ASMRW were 1.99/100 000 and 1.96/100 000, respectively. The cumulative mortality rate (0-74 years) was 0.24%. The APCs of crude incidence rate and crude mortality rate were 4.66% (95%CI: 2.11%-7.29%) and 7.45% (95%CI: 5.46%-9.47%) (all P<0.05). The APCs of ASIRC and ASIRW were 2.30% (95%CI: -0.32%-4.99%) and 2.41% (95%CI: -0.29%-5.20%) (all P>0.05), and the APCs of ASMRC and ASMRW were 4.43% (95%CI: 2.54%-6.36%) and 4.55% (95%CI: 2.58%-6.57%) (all P<0.05). Conclusions: The incidence and mortality of ovarian cancer in Jiangsu were at low levels, and were higher in urban areas than in rural areas. The crude incidence and mortality rates increased, and age-standardized incidence rate was stable, but age-standardized mortality rate increased obviously.