| Reliability study n = 88 | Validity study n = 64 |
---|---|---|
Variable | Median (min-max) | |
Age at inclusion (years) | 28 (20–42) | 30 (22–44) |
Gestational week at inclusion | 19 (16–31) | 21 (16–35) |
Pre-pregnancy weight (kg) | 64 (51–103) | 63 (50–112) |
Pre-pregnancy BMI (kg/m2) | 22.6 (17.9–38.3) | 22.3 (19.5–43.2) |
 | n (%) | |
Educational level   ≥ 4 years college/university | 28 (31.8) | 29 (45.3) |
Occupation  Employed outside home  Long-term sick leave | 78 (88.6) 1 (1.1) | 55 (85.9) 0 |
Household income (NOK)   ≤ 400,000  401,000–700,000   > 700,000  Wish not to answer | 12 (13.6) 33 (37.5) 38 (43.2) 5 (5.7) | 20 (31.0) 14 (22.0) 30 (47.0) - |
Evaluation of own health  Good/very good | 78 (88.6) | 59 (92.2) |
Marital status  Married/cohabitant/partner  Single | 86 (97.7) 1 (1.1) | 61 (95.3) 2 (3.1) |
Tobacco habits  Non-smoker  Smoked pre-pregnancy  Daily smoker  Daily snuff | 67 (76.1) 19 (21.6) 2 (2.3) 0 (0) | 48 (75.0) 13 (20.3) 3 (4.7) 2 (3.1) |