Characteristics of people offered screening, who registered and accepted a Chlamydia trachomatis screening test; and independent predictors of test uptake: univariate and multivariable analysis
| Characteristic | Number offered screening | Uptake, N (row %) | Crude OR (95% CI)* | p Value† | Adjusted OR (95% CI)‡ | Adjusted p value‡ |
| Sex | ||||||
| Male | 15 136 | 1480 (9.8) | 1 | 1 | ||
| Female | 14 773 | 1951 (13.2) | 1.40 (1.30 to 1.52) | <0.001 | 1.40 (1.30 to 1.52) | <0.001 |
| Missing | 8 | 0 (0.0) | ||||
| Age group, years | 0.006 | 0.02 | ||||
| 17–18 | 3773 | 466 (12.3) | 1 | 1 | ||
| 19 | 4512 | 564 (12.5) | 1.01 (0.83 to 1.24) | 1.05 (0.93 to 1.02) | ||
| 20 | 4532 | 569 (12.6) | 1.02 (0.84 to 1.24) | 1.06 (0.92 to 1.21) | ||
| 21 | 4643 | 466 (10.0) | 0.80 (0.61 to 1.04) | 0.81 (0.65 to 1.01) | ||
| 22 | 4220 | 444 (10.5) | 0.84 (0.65 to 1.08) | 0.85 (0.68 to 1.06) | ||
| 23 | 4099 | 434 (10.6) | 0.85 (0.67 to 1.07) | 0.84 (0.68 to 1.04) | ||
| 24–25 | 4128 | 486 (11.8) | 0.95 (0.82 to 1.1) | 0.94 (0.82 to 1.09) | ||
| Missing | 10 | 2 (20.0) | ||||
| Index of Multiple Deprivation quintile | <0.001 | <0.001 | ||||
| Least deprived: 1 | 5857 | 389 (6.6) | 1 | 1 | ||
| 2 | 6048 | 802 (13.3) | 2.14 (0.68 to 6.78) | 2.15 (0.67 to 6.87) | ||
| 3 | 6004 | 872 (14.5) | 2.38 (0.73 to 7.73) | 2.39 (0.73 to 7.81) | ||
| 4 | 5992 | 687 (11.5) | 1.82 (0.75 to 4.38) | 1.81 (0.75 to 4.37) | ||
| Most deprived: 5 | 6002 | 676 (11.3) | 1.78 (0.57 to 5.56) | 1.78 (0.56 to 5.61) | ||
| Missing§ | 14 | 5 (35.7) | ||||
| Total | 29 917 | 3431 (11.5) | ||||
↵* Excludes participants with missing data. Two individuals aged 17 years and one individual aged 25 years grouped with adjacent age categories.
↵† From logistic regression model, adjusted for intracluster correlation of variable within practices; for age and deprivation, p value is from Wald tests covering all categories together.
↵‡ From logistic regression model, adjusted for intracluster correlation of variable within practices and adjusted for other explanatory variables in the model; for age and deprivation, p value is from Wald tests covering all categories together.
↵§ Postcodes could not be mapped to Lower Super Output Areas.