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Table 1 Baseline characteristics of participants with valid accelerometry data at T0, T1 and T2

From: Change in level of physical activity during pregnancy in obese women: findings from the UPBEAT pilot trial

  T0 T1 T2
16+0– 18+6 weeks’ gestation 27+0– 28+6 weeks’ gestation 35+0– 36+6 weeks’ gestation
≥3 days valid data (% consented) 140 (76.5) 76 (41.5) 54 (29.5)
BMI at T0 (Kg/m2)1 33.8 (31.9, 37.6) 34.1 (32.4, 37.1) 35.6 (33.4, 38.4)**
Age (years) 1 32 (26, 35) 32 (28, 35) 33 (28, 36)**
Parity       
Nulliparous 62 (45.9) 26 (34.7)* 17 (31.5)**
Parous 73 (54.1) 49 (65.3) 37 (68.5)
Smoking status       
Current or ex-smoker 46 (34.1) 30 (40.0) 20 (37.0)
Never smoked 89 (65.9) 45 (60.0) 34 (63.0)
Ethnicity       
White 84 (62.2) 48 (64.0) 34 (63.0)
Black, Asian or other 51 (37.8) 27 (36.0) 20 (37.0)
Marital status       
Married/cohabiting 69 (51.1) 38 (50.7) 28 (51.9)
Single/divorced/separate 66 (48.9) 37 (49.3) 26 (48.1)
Educational achievement       
Degree or higher 62 (45.9) 35 (46.7) 26 (48.1)
No degree 73 (54.1) 40 (53.3) 28 (51.9)
Employment status       
Paid or self employment 92 (68.7) 50 (66.7) 40 (74.1)
Not in paid employment 42 (31.3) 25 (33.3) 14 (25.9)
Living accommodation       
Owned or private rented 76 (54.3) 48 (63.2)* 36 (66.7)**
Rented (council) 64 (45.7) 28 (36.8) 18 (33.3)
IMD quintile       
1 (least deprived) 4 (3.4) 4 (6.2) 3 (6.5)
2 4 (3.4) 2 (3.1) 1 (2.2)
3 14 (12.1) 7 (10.8) 4 (8.7)
4 44 (37.9) 26 (40.0) 21 (45.7)
5 (most deprived) 50 (43.1) 26 (40.0) 17 (37.0)
Weight gain2       
Above IOM guideline      23 (45.1)
Within or below IOM guideline      28 (54.9)
  1. Figures are n(%); 1Median (inter-quartile range); 2The American Institute of Medicine (IOM) recommends that obese women should gain between 5–9 kg during pregnancy.
  2. *p < 0.05 for difference between baseline and 28 weeks.
  3. **p < 0.05 for difference between baseline and 35 weeks.