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Table 1 Baseline characteristics of participants in the reliability and validity studies

From: Reliability and concurrent validity of the International Physical Activity Questionnaire short form among pregnant women

  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)