Table 2.

Incidence of T. gondii infection among previously uninfected pregnant women

CharacteristicNo. of womenNo. (%) of women with primary infection95% CI (%)Incidence (%)a
Total32,03347 (0.147)0.101–0.1920.173
Trimester
 First32,03330 (0.094)0.060–0.1280.287
 Second32,0337 (0.022)0.005–0.0390.073
 Third32,03310 (0.031)0.008–0.0550.140
Area of residence
 Urban17,80634 (0.191)0.121–0.2600.225
 Rural14,22713 (0.091)0.038–0.1450.108
 Oslo7,16128 (0.391)0.234–0.5480.460
 Total excluding Oslo24,87219 (0.076)0.039–0.1140.090
 Urban excluding Oslo10,6456 (0.056)0.007–0.1050.066
Nationality
 Norwegian30,05637 (0.123)0.080–0.1660.145
 Foreign1,97710 (0.506)0.167–0.8450.595
 Oslo
  Norwegian6,09823 (0.377)0.210–0.5440.444
  Foreign1,0635 (0.470)0.024–0.9160.554
 Total excluding Oslo
  Norwegian23,95814 (0.058)0.025–0.0920.069
  Foreign9145 (0.547)0.029–1.0660.644
Age (yr)
 <201,1492 (0.174)−0.087–0.4350.205
 20–247,2534 (0.055)−0.003–0.1140.065
 25–2912,03521 (0.174)0.094–0.2550.205
 30–348,07314 (0.173)0.075–0.2720.204
 35–393,0015 (0.167)0.008–0.3250.196
 ≥405221 (0.192)−0.215–0.5980.225
  • a Incidence per 40 weeks of pregnancy.