Table 3

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 valuesOR (95% CI)P valuesOR (95% CI)P values
Randomisation group27.65 (17.35 to 44.06) <0.001 N/AN/AN/AN/A
Regular smoking1.13 (0.82 to 1.57)0.4501.61 (0.73 to 3.57)0.2381.03 (0.62 to 1.72)0.911
Regular use of alcohol1.20 (0.81 to 1.77)0.3680.97 (0.40 to 2.39)0.9501.15 (0.62 to 2.13)0.663
History of drug abuse2.03 (0.80 to 5.11)0.1354.20 (0.78 to 22.73)0.0961.08 (0.29 to 4.10)0.909
Diagnosis of a psychiatric condition0.79 (0.50 to 1.24)0.3021.64 (0.66 to 4.07)0.2880.71 (0.35 to 1.46)0.350
Diagnosis of a somatic condition0.76 (0.55 to 1.07)0.1140.81 (0.36 to 1.82)0.6120.68 (0.40 to 1.14)0.144
STAI index >40 at baseline1.24 (0.88 to 1.74)0.2152.60 (1.01 to 6.71) 0.048 0.91 (0.53 to 1.59)0.748
STAI index >40 at 3 months1.33 (0.83 to 2.14)0.2392.70 (0.71 to 10.36)0.1470.78 (0.40 to 1.53)0.471
History of cervical screening abnormality1.10 (0.62 to 1.97)0.7450.75 (0.17 to 3.32)0.7002.53 (0.73 to 8.77)0.142
History of colposcopy0.86 (0.41 to 1.79)0.6801.26 (0.27 to 5.78)0.7670.89 (0.27 to 2.93)0.852
History of pregnancy*1.28 (0.90 to 1.81)0.1724.26 (1.25 to 14.46) 0.020 1.31 (0.77 to 2.24)0.320
History of TOP1.32 (0.95 to 1.82)0.1014.07 (1.67 to 9.88) 0.002 1.64 (0.95 to 2.83)0.074
History of delivery0.81 (0.59 to 1.12)0.2081.26 (0.58 to 2.74)0.5640.68 (0.41 to 1.14)0.141
Marital status
 Single
 (reference category)
1.01.001.00
 Cohabitating0.55 (0.34 to 0.88) 0.012 0.62 (0.20 to 1.92)0.4070.52 (0.25 to 1.07)0.074
 Married0.71 (0.49 to 1.04)0.0820.64 (0.24 to 1.68)0.3650.65 (0.36 to 1.18)0.153
Age group (years)
 <20 (reference category)1.01.001.00
 20–241.23 (0.60 to 2.53)0.5660.42 (0.10 to 1.82)0.2452.01 (0.66 to 6.14)0.221
 25–291.69 (0.82 to 3.51)0.1581.06 (0.26 to 4.24)0.9392.11 (0.68 to 6.59)0.197
 30–340.86 (0.40 to 1.84)0.6950.67 (0.15 to 2.93)0.5910.79 (0.26 to 2.46)0.689
 35–391.37 (0.62 to 3.00)0.4340.53 (0.10 to 2.87)0.4601.63 (0.49 to 5.47)0.424
 ≥401.07 (0.41 to 2.83)0.8890.0001.001.31 (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.