Table 1.
Baseline characteristics of participants with valid accelerometry data at T0, T1 and T2
| 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) | ||||
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.
*p < 0.05 for difference between baseline and 28 weeks.
**p < 0.05 for difference between baseline and 35 weeks.