Comparison of patients with pelvic inflammatory disease with general practice control group: unadjusted ORs, adjusted ORs (95% CIs)
| Variable | Patients n = 140 n (%) | Controls, n = 136 n (%) | Adjusted OR(95% CI) | p Value |
|---|---|---|---|---|
| LCR, ligase chain reaction; MIF, microimmunofluorescence; STI, sexually transmitted infection. | ||||
| *Standard occupational classification 2000; 1, managers and senior officials; professional; associate professional and technical; 2, administrative and secretarial; skilled trades; 3, personal service; sales, customer service; 4, process, plant and machine operatives; elementary; 5, unknown.14 | ||||
| †Coil, cap and injection (Depo-Provera). | ||||
| ‡Stillbirth, miscarriage, ectopic pregnancy. | ||||
| §Combined results of nucleic acid amplification, serological and heat shock protein 60 (CHSP60) tests. Yes, LCR positive, MIF positive or CHSP60 positive; no, LCR negative, MIF negative and CHSP60 negative. | ||||
| Age group (years) | 0.047 | |||
| 16–24 | 77 (55) | 36 (26) | 3.12 (1.23 to 7.83) | |
| 25–34 | 48 (34) | 72 (53) | 1 | |
| ⩾35 | 15 (11) | 28 (21) | 1.05 (0.30 to 3.71) | |
| Age at first sexual intercourse | 0.009 | |||
| <15 | 24 (17) | 5 (4) | 4.06 (1.11 to 14.86) | |
| 15–19 | 113 (81) | 109 (80) | 1 | |
| ⩾20 | 3 (2) | 22 (16) | 0.22 (0.43 to 1.10) | |
| Lifetime sexual partners | 0.474 | |||
| 1–4 | 70 (50) | 90 (66) | 1 | |
| ⩾5 | 70 (50) | 46 (34) | 1.32 (0.62 to 2.84) | |
| Ethnicity | 0.187 | |||
| White | 125 (89) | 125 (92) | 1 | |
| Other | 15 (11) | 11 (8) | 2.22 (0.67 to 7.30) | |
| Socioeconomic status* | 0.005 | |||
| 1 | 22 (16) | 42 (31) | 1 | |
| 2 | 18 (13) | 37 (27) | 0.74 (0.24 to 2.26) | |
| 3 | 53 (38) | 18 (13) | 4.59 (1.48 to 14.17) | |
| 4 | 7 (5) | 15 (11) | 1.08 (0.25 to 4.59) | |
| 5 | 40 (28) | 24 (18) | 1.32 (0.42 to 4.11) | |
| Children | 0.53 | |||
| Yes | 68 (49) | 66 (49) | 1.32 (0.55 to 3.17) | |
| No | 72 (51) | 71 (51) | 1 | |
| Contraception | 0.839 | |||
| Condom (1) | 42 (30) | 50 (37) | 1 | |
| Oral (2) | 40 (29) | 34 (25) | 1.48 (0.62 to 3.59) | |
| Other† (3) | 34 (24) | 26 (19) | 1.14 (0.43 to 3.00) | |
| None (4) | 24 (17) | 26 (19) | 1.30 (0.44 to 3.89) | |
| Marital status | 0.004 | |||
| Married (1) | 11 (8) | 40 (29) | 1 | |
| Cohabiting (2) | 31 (22) | 30 (22) | 4.04 (1.13 to 14.42) | |
| Widowed/separated/divorce (3) | 18 (13) | 9 (7) | 14.36 (3.17 to 65.07) | |
| Single (4) | 80 (57) | 57 (42) | 4.13 (1.21 to 14.02) | |
| Smoker | 0.928 | |||
| Yes | 86 (61) | 59 (43) | 0.97 (0.48 to 1.96) | |
| No | 54 (39) | 77 (57) | 1 | |
| Termination of pregnancy | 0.994 | |||
| Yes | 41 (29) | 25 (18) | 1.00 (0.55 to 3.17) | |
| No | 99 (71) | 111 (82) | 1 | |
| Adverse pregnancy outcome‡ | 0.027 | |||
| Yes | 26 (19) | 14 (10) | 3.11 (1.11 to 8.72) | |
| No | 114 (81) | 122 (90) | 1 | |
| History of an STI | <0.001 | |||
| Yes | 82 (59) | 17 (13) | 12.42 (5.42 to 28.42) | |
| No | 58 (41) | 119 (87) | 1 | |
| Exposure to C trachomatis§ | 0.025 | |||
| Yes | 42 (30) | 11 (8) | 2.88 (1.12 to 7.41) | |
| No | 98 (70) | 125 (92) | 1 | |