Table 1 Demographic characteristics of FSW in Period 2008–2011 and Period 2012–2015
Variables | Period 2008–2011 | Period 2012–2015 | χ 2 | P |
|---|---|---|---|---|
Age |  |  | 4.46 | < 0.001 |
 16–30 | 1904 (58.6) | 1464 (34.5) |  |  |
 31–50 | 1318 (40.6) | 2670 (62.9) | ||
 > 50 | 26 (0.8) | 114 (2.7) | ||
Relationship status |  |  | 4.28 | < 0.001 |
 Single or regular sexual partner (not living together) | 1184 (36.5) | 717 (16.9) |  |  |
 Married | 1859 (57.2) | 3120 (73.4) | ||
 Cohabiting | 127 (3.9) | 124 (2.9) | ||
 Divorced or widowed | 78 (2.4) | 287 (6.8) | ||
Hukou (Registered residence) |  |  | 15.01 | < 0.001 |
 Guangxi | 1820 (56.0) | 2189 (51.5) |  |  |
 Outside Guangxi | 1428 (44.0) | 2059 (48.5) | ||
Ethnicity | Â | Â | 1.11 | 0.574 |
 Han | 2581 (79.5) | 3361 (79.1) |  |  |
 Zhuang | 386 (11.9) | 491 (11.6) | ||
 Other | 281 (8.7) | 396 (9.3) | ||
Education level |  |  | 1.36 | < 0.001 |
 Illiteracy | 234 (7.2) | 356 (8.4) |  |  |
 Primary school | 1190 (36.6) | 1995 (47.0) | ||
 Middle school | 1476 (45.4) | 1671 (39.3) | ||
 High school | 317 (9.8) | 204 (4.8) | ||
 College and above | 31 (1.0) | 22 (0.5) | ||
Total | 3248 | 4248 | Â | Â |