Analysis of the sex ratio of reported gonorrhoea incidence in Shenzhen, China

Xiong, Mingzhou; Lan, Lina; Feng, Tiejian; Zhao, Guanglu; Wang, Feng; Hong, Fuchang; Wu, Xiaobing; Zhang, Chunlai; Wen, Lizhang; Liu, Aizhong; Best, John McCulloch; Tang, Weiming

Participants were recruited from the dermatology and STD department (STD clinic), obstetrics-gynaecology (OBGYN clinic) and urology outpatient clinic (GUM clinic). A total of 88 clinics, including 26 STD clinics, 34 OBGYN and 28 GUM clinics, were selected from 34 hospitals in Shenzhen. These hospitals were selected of the 144 hospitals that have mandatory reporting of STD cases to CISDCP online within an allotted time and located in the six districts of Shenzhen City. A probability sampling strategy was generated on the basis of patient flow (measured by the average number of STD cases reported to CISDCP in 2009-2011) and administrative level set (municipal level, street level and privately operated). Participants were sampled conveniently and sequentially among those who presented to these clinics for care. Eligible participants were patients who presented for outpatient STD care at the selected clinics for the first time in October, 2012, were at least 18 years old, and were able to give informed consent.