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2022 Vol. 4, No. 48

Foreword
Vital Surveillances
Trends in Incidence Rates, Mortality Rates, and Age-Period-Cohort Effects of Cervical Cancer — China, 2003–2017
Kexin Sun, Rongshou Zheng, Lin Lei, Siwei Zhang, Hongmei Zeng, Shaoming Wang, Li Li, Ru Chen, Bingfeng Han, Ji Peng, Wenqiang Wei, Jie He
2022, 4(48): 1070-1076. doi: 10.46234/ccdcw2022.216
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Abstract:
Introduction

This study reported the trends and analyzed the age-period-cohort effects on the incidence and mortality rates of cervical cancer in China.

Methods

The age-standardized incidence rate (ASIR) and mortality rate (ASMR) by Segi’s world standard population were calculated using qualified consecutive data from 22 cancer registries from 2003 to 2017 in China. We performed joinpoint analysis to describe the trends and age-period-cohort analysis to estimate the independent effects of age, period and cohort on trends in incidence and mortality rates of cervical cancer.

Results

The ASIR and ASMR for cervical cancer in females over 20 years old increased during 2003−2017. For females <50 years, a decreasing trend in ASIR and a stable trend in ASMR were observed in urban areas after 2009. But the ASIR and ASMR kept increasing in rural areas during the whole period. For females >50 years, the ASIR and ASMR increased both in urban and rural areas. Age-period-cohort analysis showed increasing period effects on cervical cancer incidence and mortality during the whole period. The cohort effects exhibited a downward-upward-downward pattern for the incidence (1918–1938, 1938–1963, 1963–1993) and mortality rates (1918–1943, 1943–1963, 1963–1993) in urban areas, a fluctuating pattern for incidence rate and a continuing downward pattern for mortality rate (1918–1993) in rural areas.

Conclusions

The increases in cervical cancer incidence and mortality rates can be mostly explained by period effects. We observed decreases in risk for cervical cancer incidence and mortality in young female generations, which were more obvious in urban areas.

Preplanned Studies
Cervical Cancer Screening Coverage — China, 2018–2019
Mei Zhang, Yijing Zhong, Limin Wang, Heling Bao, Zhengjing Huang, Zhenping Zhao, Xiao Zhang, Chun Li, Kelly Liang Sun, Jing Wu, Xiaoying Zheng, Linhong Wang
2022, 4(48): 1077-1082. doi: 10.46234/ccdcw2022.217
Abstract(10002) HTML (668) PDF 676KB(63)
Abstract:
What is already known about this topic?

The World Health Organization set a 2030 target of 70% cervical cancer screening coverage for women aged 35–45 years. Coverage stood at 37% in China in 2015.

What is added by this report?

In 2018–2019, China’s cervical cancer screening coverage reached 43.4% in women aged 35–44 years and 36.8% in women aged 35–64 years. Screening coverage was still lower in rural areas as well as central and western regions; large variations existed across provincial-level administrative divisions.

What are the implications for public health practice?

National and local policy and financial support should be maintained for cervical cancer screening, along with more targeted health education and outreach efforts and strengthened accessibility of health services in the rural areas and central and western regions.

Prevalence of High-Risk Human Papillomavirus in Cervical Intraepithelial Neoplasia in the Pre-Vaccine Era — China, 2017–2018
Heling Bao, Weihong Chen, Xiaosong Zhang, Hui Bi, Yun Zhao, Liwen Fang, Shu Cong, Feng Tan, Linhong Wang
2022, 4(48): 1083-1087. doi: 10.46234/ccdcw2022.218
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Abstract:
What is already known about this topic?

Human papillomavirus (HPV) type-specific strategies play a key role in the prevention of cervical intraepithelial neoplasia (CIN), but evidence on the HPV type-specific prevalence in CIN is limited.

What is added by this report?

This multicentric study estimates the prevalence of high-risk HPV types in CIN cases and the associations of HPV infection patterns with high-grade CIN in China in 2017–2018.

What are the implications for public health practice?

Population-based prevention strategies should give preference to HPV-16 and 18, and strategies for non-16/18 high-risk HPV are essential for the elimination of cervical cancer.

Prevalence of High-Risk Human Papillomavirus by Subtypes Among Rural Women Aged 35–64 Years — Guangzhou City, Guangdong Province, China, 2019–2021
Dantong Shao, Xiaoyan Xia, Huihui Liu, Mingxi Huang, Jia Yu, Jianrong He, Xiu Qiu
2022, 4(48): 1088-1091. doi: 10.46234/ccdcw2022.219
Abstract(7288) HTML (169) PDF 412KB(55)
Abstract:
What is already known about this topic?

Little is known about the infection pattern for high-risk human papillomavirus (hrHPV) subtypes in rural areas in southern China.

What is added by this report?

The prevalence of HPV-16, 18, and the other 12 hrHPV subtypes were 0.71%, 0.34%, and 4.50%, respectively, among rural women in Guangzhou. The prevalence of HPV-16 and the other 12 hrHPV subtypes increased with age, but there was no evident age trend for HPV-18 prevalence.

What are the implications for public health practice?

Epidemiological characteristics of hrHPV prevalence in rural Guangzhou should be considered to identify high-risk populations of hrHPV infection and determine follow-up strategies.