Table 3.
Number, proportion and determinants of returning self-sampling kits among users of online services for self-sampling for STIs at home
| Exposure variable | Unreturned kits, n (%) | Returned kits, n (%) | Crude OR (95% CI) n=3964 |
Adjusted OR† (95% CI) n=3947 |
| Age group (years) | ||||
| 16–20 | 71 (7.4) | 101 (4.0) | 1 (ref) | 1 (ref) |
| 20–25 | 294 (30.4) | 770 (30.2) | 1.84** (1.32 to 2.57) | 1.68* (1.20 to 2.36) |
| 25–30 | 340 (35.2) | 954 (37.4) | 1.97** (1.42 to 2.47) | 1.81* (1.29 to 2.54) |
| 30–35 | 128 (13.3) | 395 (15.5) | 2.17** (1.51 to 3.12) | 2.03** (1.40 to 2.94) |
| 35+ | 133 (13.8) | 329 (12.9) | 1.74* (1.21 to 2.50) | 1.66* (1.14 to 2.42) |
| Gender | ||||
| Male | 374 (38.7) | 911 (35.7) | 1 (ref) | 1 (ref) |
| Female | 592 (61.3) | 1638 (64.3) | 1.14 (0.98 to 1.32) | 1.18 (1.00 to 0.39) |
| Ethnic group | ||||
| White British | 488 (50.6) | 1482 (58.3) | 1 (ref) | 1 (ref) |
| White other | 111 (11.5) | 324 (12.7) | 0.96 (0.76 to 1.22) | 0.95 (0.75 to 1.21) |
| Black African | 58 (6.0) | 116 (4.6) | 0.66* (0.47 to 0.92) | 0.70* (0.50 to 0.98) |
| Black Caribbean | 69 (7.2) | 166 (6.5) | 0.79 (0.59 to 1.07) | 0.84 (0.62 to 1.13) |
| Black other | 37 (3.8) | 97 (3.8) | 0.86 (0.58 to 1.28) | 0.92 (0.62 to 1.36) |
| Mixed white black African or Caribbean | 68 (7.1) | 124 (4.9) | 0.60* (0.44 to 0.82) | 0.64* (0.47 to 0.88) |
| South Asian | 14 (1.5) | 36 (1.4) | 0.85 (0.45 to 1.58) | 0.93 (0.49 to 1.74) |
| Any other ethnic group | 100 (10.4) | 170 (6.7) | 0.56** (0.53 to 0.73) | 0.58** (0.44 to 0.76) |
| Not stated | 19 (2.0) | 29 (1.1) | 0.50* (0.28 to 0.90) | 0.50* (0.28 to 0.91) |
| Sexual orientation | ||||
| Heterosexual | 777 (80.4) | 2083 (81.7) | 1 (ref) | 1 (ref) |
| Homosexual | 123 (12.7) | 332 (13.0) | 1.01 (0.81 to 1.26) | 1.06 (0.83 to 1.36) |
| Bisexual | 40 (4.1) | 100 (3.9) | 0.93 (0.64 to 1.36) | 0.96 (0.65 to 1.40) |
| Not stated/not known | 26 (2.7) | 34 (1.3) | 0.49* (0.29 to 0.82) | 0.53* (0.31 to 0.89) |
| IMD quintile | ||||
| 1 (most deprived) | 325 (33.8) | 791 (31.1) | 1 (ref) | – |
| 2 | 418 (43.4) | 1122 (44.2) | 1.10 (0.93 to 1.31) | – |
| 3 | 186 (19.3) | 494 (19.4) | 1.09 (0.88 to 1.35) | – |
| 4 | 29 (3.0) | 117 (4.6) | 1.66* (1.08 to 2.54) | – |
| 5 (least deprived) | 5 (0.5) | 17 (0.7) | 1.40 (0.51 to 3.81) | – |
| Total | 966 (27.5) | 2549 (72.5) | ||
Missing data for 11 observations for IMD and 7 observations for ethnic group. Missing data excluded from multivariate analysis.
*P<0.05, **P<0.001.
†Adjusted for age group, gender, ethnic group and sexual orientation.
IMD, Index of Multiple Deprivation.