Multivariate analysis: correlates of infection with syphilis among women attending antenatal clinics in Shenzhen, China*
| Variable | No. cases (%) | No. controls (%) | OR (95% CI) | P value |
|---|---|---|---|---|
| CI, Confidence interval; OR, odds ratio; STI, sexually transmitted infection. *Totals may not sum to the recruited participants as a result of missing values. | ||||
| Marital status | ||||
| Married | 108 (83.7) | 322 (94.2) | 1 (Referent) | |
| Single or cohabiting | 21 (16.3) | 20 (5.8) | 4.16 (1.38–12.54 | 0.01 |
| Education | ||||
| Secondary school or below | 76 (58.9) | 145 (42.3) | 8.57 (2.30–31.91) | 0.001 |
| High school | 44 (34.1) | 137 (39.9) | 3.98 (1.12–14.19) | 0.03 |
| College or above | 9 (7.0) | 61 (17.8) | 1 (Referent) | 0.001 |
| No. of lifetime sex partners | ||||
| 1 | 35 (31.5) | 173 (65.5) | 1 (Referent) | |
| 2 or above | 76 (68.5) | 91 (34.5) | 3.81 (1.94–7.49) | <0.001 |
| Condom use in most recent sex | ||||
| Yes | 44 (36.4) | 43 (13.1) | 1 (Referent) | |
| No | 69 (57.0) | 226 (68.7) | 0.36 (0.14–0.94) | 0.04 |
| Ever history of STI | ||||
| No | 103 (81.1) | 329 (98.5) | 1 (Referent) | |
| Yes | 24 (18.9) | 5 (1.5) | 13.89 (3.49–55.29) | <0.001 |
| Ever history of induced abortion | ||||
| No | 26 (21.1) | 155 (51.2) | 1 (Referent) | |
| Yes | 97 (78.9) | 148 (48.8) | 6.49 (3.03–13.91) | <0.001 |
| Travel of sex partner in past 12 months | ||||
| No | 71 (55.5) | 272 (80.5) | 1 (Referent) | |
| Yes | 57 (44.5) | 66 (19.5) | 4.81 (2.43–9.55) | <0.001 |