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Table 3 Mean STAI-3 for control and intervention group, mean STAI-3 score relative to background characteristic. Means are estimated using a multi level model

From: GP-initiated preconception counselling in a randomised controlled trial does not induce anxiety

  Control Intervention
    Only received invitation Filled in risk assessment Received PCC TOTAL Intervention
  n * STAI n * STAI n * STAI n * STAI n * STAI
Total 1090 38.5 962 38.9 71 37.7 153 37.8 1186 38.7
Age groups           
   18–25 88 42.1 55 42.1 6 44.4 4 36.7 65 42.0
   26–30 226 36.9 156 39.9¶ 11 38.2 39 38.6 206 39.6 ¶
   31–35 550 38.5 493 38.1 42 36.5 73 36.9 608 37.9
   >36 226 38.7 258 39.1 12 38.2 37 39.1 307 39.1
Education           
   University/College 396 36.8 352 37.7 37 34.5 68 36.6 457 37.3
   Intermediate secondary 420 39.2 397 39.2 25 38.8 67 38.1 489 39.1
   Basic secondary or less 242 39.9 190 40.5 8 47.2 16 39.8 214 40.7
Country of origin           
   The Netherlands 974 38.1 886 38.7 68 38.5 148 37.1 1102 38.5
   Other 116 41.7 76 40.6 3 23.9# 5 59.6§ 84 41.2
Adverse pregnancy outcome †           
   Yes 203 42.3 169 42.1 8 40.1 21 41.6 198 41.9
   No 698 37.3 578 38.0 42 37.8 97 37.9 717 38.0
   Unknown ‡ 189 39.0 215 39.0 21 36.7 35 35.2 271 38.3
  1. *Numbers may differ due to non-response † adverse pregnancy outcome is either miscarriage, preterm, stillbirth, disorder of the newborn ‡ either duration of pregnancy and/or disorder of the new born unknown. ¶ p = 0.02 versus control group # p = 0.03 versus received only invitation. § p = 0,003 versus only received invitation and p = 0.0003 versus filled in questionnaire.