Table 2 Population sizes, estimated syphilis prevalence (default estimates) and share of provincial prevalent cases in 4 adult (15–49 years) sub-populations in Yunnan province, 2005 and 2017.

From: The Spectrum-STI Groups model: syphilis prevalence trends across high-risk and lower-risk populations in Yunnan, China

Population group

Population size

Prevalence % (95% Confidence Interval)

Share of all prevalent cases

2005

2017

2005

2017

2017

Lower-risk women

12,077,922

12,148,877

0.26 (0.11–0.47)

0.25 (0.18–0.35)

45%

Lower-risk men

12,893,877

13,135,136

0.26 (0.18–0.37)

0.24 (0.17–0.31)

46%

FSW

36,343

36,556

1.93 (1.34–2.77)

1.69 (0.68–3.97)

0.91%

MSM

103,983

105,929

6.84 (1.78–13.82)

5.35 (2.74–12.47)

8.4%

All women

12,114,265

12,185,433

0.26 (0.18–0.35)

0.26 (0.17–0.34)

46%

All men

12,997,860

13,241,065

0.32 (0.24–0.40)

0.28 (0.20–0.36)

54%

All women and men

25,112,125

25,544,343

0.29 (0.22–0.36)

0.29 (0.22–0.36)

100%