Odds of not receiving an IUD during 3 months after TOP in women undergoing a first trimester termination of pregnancy and planning IUD contraception
| Both groups (n=605) | Intervention group (n=306) | Control group (n=299) | ||||
| OR (95% CI) | P values | OR (95% CI) | P values | OR (95% CI) | P values | |
| Randomisation group | 27.65 (17.35 to 44.06) | <0.001 | N/A | N/A | N/A | N/A |
| Regular smoking | 1.13 (0.82 to 1.57) | 0.450 | 1.61 (0.73 to 3.57) | 0.238 | 1.03 (0.62 to 1.72) | 0.911 |
| Regular use of alcohol | 1.20 (0.81 to 1.77) | 0.368 | 0.97 (0.40 to 2.39) | 0.950 | 1.15 (0.62 to 2.13) | 0.663 |
| History of drug abuse | 2.03 (0.80 to 5.11) | 0.135 | 4.20 (0.78 to 22.73) | 0.096 | 1.08 (0.29 to 4.10) | 0.909 |
| Diagnosis of a psychiatric condition | 0.79 (0.50 to 1.24) | 0.302 | 1.64 (0.66 to 4.07) | 0.288 | 0.71 (0.35 to 1.46) | 0.350 |
| Diagnosis of a somatic condition | 0.76 (0.55 to 1.07) | 0.114 | 0.81 (0.36 to 1.82) | 0.612 | 0.68 (0.40 to 1.14) | 0.144 |
| STAI index >40 at baseline | 1.24 (0.88 to 1.74) | 0.215 | 2.60 (1.01 to 6.71) | 0.048 | 0.91 (0.53 to 1.59) | 0.748 |
| STAI index >40 at 3 months | 1.33 (0.83 to 2.14) | 0.239 | 2.70 (0.71 to 10.36) | 0.147 | 0.78 (0.40 to 1.53) | 0.471 |
| History of cervical screening abnormality | 1.10 (0.62 to 1.97) | 0.745 | 0.75 (0.17 to 3.32) | 0.700 | 2.53 (0.73 to 8.77) | 0.142 |
| History of colposcopy | 0.86 (0.41 to 1.79) | 0.680 | 1.26 (0.27 to 5.78) | 0.767 | 0.89 (0.27 to 2.93) | 0.852 |
| History of pregnancy* | 1.28 (0.90 to 1.81) | 0.172 | 4.26 (1.25 to 14.46) | 0.020 | 1.31 (0.77 to 2.24) | 0.320 |
| History of TOP | 1.32 (0.95 to 1.82) | 0.101 | 4.07 (1.67 to 9.88) | 0.002 | 1.64 (0.95 to 2.83) | 0.074 |
| History of delivery | 0.81 (0.59 to 1.12) | 0.208 | 1.26 (0.58 to 2.74) | 0.564 | 0.68 (0.41 to 1.14) | 0.141 |
| Marital status | ||||||
| Single (reference category) | 1.0 | – | 1.00 | – | 1.00 | – |
| Cohabitating | 0.55 (0.34 to 0.88) | 0.012 | 0.62 (0.20 to 1.92) | 0.407 | 0.52 (0.25 to 1.07) | 0.074 |
| Married | 0.71 (0.49 to 1.04) | 0.082 | 0.64 (0.24 to 1.68) | 0.365 | 0.65 (0.36 to 1.18) | 0.153 |
| Age group (years) | ||||||
| <20 (reference category) | 1.0 | – | 1.00 | – | 1.00 | – |
| 20–24 | 1.23 (0.60 to 2.53) | 0.566 | 0.42 (0.10 to 1.82) | 0.245 | 2.01 (0.66 to 6.14) | 0.221 |
| 25–29 | 1.69 (0.82 to 3.51) | 0.158 | 1.06 (0.26 to 4.24) | 0.939 | 2.11 (0.68 to 6.59) | 0.197 |
| 30–34 | 0.86 (0.40 to 1.84) | 0.695 | 0.67 (0.15 to 2.93) | 0.591 | 0.79 (0.26 to 2.46) | 0.689 |
| 35–39 | 1.37 (0.62 to 3.00) | 0.434 | 0.53 (0.10 to 2.87) | 0.460 | 1.63 (0.49 to 5.47) | 0.424 |
| ≥40 | 1.07 (0.41 to 2.83) | 0.889 | 0.000 | 1.00 | 1.31 (0.31 to 5.53) | 0.714 |
*Includes all previous pregnancies, regardless of the outcome, before the index pregnancy.
IUD, intrauterine device; STAI, State-Trait Anxiety Inventory; TOP, termination of pregnancy.