|  | Unadjusted model |  | Adjusted model§ | ||
---|---|---|---|---|---|---|
 |  | SumIndex >6 | P-value* | RD*100 | (95% CI) | |
 | Total n 63,561 | n | % |  |  |  |
Total | Â | Â | 9.1 | Â | Â | Â |
Prevalence at ref. category | Â | Â | Â | Â | 7.8 | Â |
Age | Â | Â | Â | <0.001 | Â | Â |
   <20 | 854 | 239 | 28 |  | 15.6 | (12.6,18.7) |
   20-24 | 7745 | 996 | 12.9 |  | 3.0 | (2.1, 3.8) |
   25-29 | 22689 | 1820 | 8.0 |  | -0.5 | (0.9, 0.0) |
   30-34 | 22925 | 1866 | 8.1 |  | 0 |  |
   35-39 | 8306 | 715 | 8.6 |  | 0.3 | (-0.4, 0.9) |
   40 + | 1042 | 118 | 11.3 |  | 2.6 | (0.7, 4.5) |
Prepregnant BMI | Â | Â | Â | <0.001 | Â | Â |
   <18.5 | 1825 | 226 | 12.4 |  | 1.8 | (0.4, 3.3) |
   18.5-24.9 | 40519 | 3795 | 9.4 |  | 0 |  |
   25-29.9 | 13547 | 1102 | 8.1 |  | -0.9 | (-1.4, -0.4) |
   30-34.9 | 4355 | 314 | 7.2 |  | -1.8 | (-2.5, -1.1) |
   35+ | 1645 | 128 | 7.8 |  | -1.5 | (-2.7, -0.3) |
   Missing | 1670 | 189 | 11.3 |  | 1 .0 | (-0.5, 2.5) |
Dietary habits | Â | Â | Â | <0.001 | Â | Â |
   Meat/fish | 63449 | 5716 | 9.0 |  | 0 |  |
   Vegetarian | 112 | 38 | 33.9 |  | 23.1 | (14.4, 31.8) |
Alcohol in pregnancy | Â | Â | Â | 0.59 | Â | Â |
   No | 56182 | 5072 | 9.0 |  | 0 |  |
   Yes | 7379 | 682 | 9.2 |  | 0.7 | (0.0, 1.4) |
Smoking in pregnancy | Â | Â | Â | <0.001 | Â | Â |
   No smoking | 58241 | 5116 | 8.8 |  | 0 |  |
   Occasionally | 1812 | 218 | 12.0 |  | 2.0 | (0.6, 3.4) |
   Daily | 3508 | 420 | 12.0 |  | 1.5 | (0.5, 2.6) |
Exercise in pregnancy | Â | Â | Â | <0.001 | Â | Â |
   No | 9166 | 756 | 8.2 |  | 0 |  |
   Less than weekly | 12317 | 888 | 7.2 |  | -0.5 | (-1.1, 0.2) |
   1-2 times weekly | 18734 | 1538 | 8.2 |  | 0.4 | (-0.3, 1.0) |
   3+ times weekly | 17992 | 1956 | 10.9 |  | 2.5 | (1.8, 3.2) |
   Missing | 5352 | 616 | 11.5 |  | 2.6 | (1.7, 3.6) |
Education | Â | Â | Â | <0.001 | Â | Â |
   <10 y-12 y | 20398 | 2252 | 11.0 |  | 0 |  |
   13-16 y | 26462 | 1822 | 6.9 |  | -2.5 | (-3.0, -1.9) |
   17+ | 15319 | 1534 | 10.0 |  | -0.1 | (-0.7, 0.6) |
   Missing | 1382 | 146 | 10.6 |  | -0.2 | (-1.8, 1.4) |
Student, participant | Â | Â | Â | <0.001 | Â | Â |
   No | 57279 | 4928 | 8.6 |  | 0 |  |
   Yes | 6282 | 826 | 13.1 |  | 1.9 | (1.1, 2.8) |
Student, participant's partner | Â | Â | Â | <0.001 | Â | Â |
   No | 60296 | 5342 | 8.9 |  | 0 |  |
   Yes | 3265 | 412 | 12.6 |  | 1.7 | (0.6, 2.9) |
Household income | Â | Â | Â | <0.001 | Â | Â |
   Low (both <NOK 300 000) | 17324 | 1861 | 10.7 |  | 0 |  |
   Medium (one ≥NOK 300 000) | 24357 | 1947 | 8.0 |  | -1.6 | (-2.1, -1.0) |
   High (both ≥NOK 300 000) | 16561 | 1268 | 7.7 |  | -2.3 | (-2.9, -1.6) |
   Missing | 5319 | 677 | 12.7 |  | 1 .0 | (-0.0, 1.9) |
Year of participation | Â | Â | Â | <0.001 | Â | Â |
   2002 | 8768 | 679 | 7.7 |  | 0 |  |
   2003 | 10834 | 855 | 7.9 |  | 0.3 | (-0.4, 1.0) |
   2004 | 10717 | 834 | 7.8 |  | 0.4 | (-0.3, 1.1) |
   2005 | 12369 | 1135 | 9.2 |  | 1.5 | (0.8, 2.2) |
   2006 | 11030 | 1097 | 9.9 |  | 2.3 | (1.6, 3.1) |
   2007 | 8562 | 993 | 11.6 |  | 4.1 | (3.3, 5.0) |
   Missing | 1281 | 161 | 12.6 |  | 3.6 | (1.7, 5.4) |
Living area | Â | Â | Â | <0.001 | Â | Â |
   Rural | 31070 | 2675 | 8.6 |  | 0 |  |
   Urban | 32491 | 3079 | 9.5 |  | 0.6 | (0.1, 1.0) |