Table 2.
Baseline characteristics of UK Biobank women included in the multivariable model of factors associated with first child’s birthweight (n = 133 187)
| Characteristic | Mean (SD) for continuously measured variables and n (%) for categorical variables |
|---|---|
| Child’s birthweight (g) | 3227.8 (477.1) |
| Age at enrolment (years) | 57.7 (7.7) |
| Age at first birth (years) | 26.0 (5.0) |
| Body mass index (kg/m2) | 27.0 (5.0) |
| Height (cm) | 162.5 (6.1) |
| Serum urate (µmol/L) | 270.8 (65.4) |
| Smoking statusa | |
| Never | 78 214 (58.7) |
| Former | 44 337 (33.3) |
| Current | 10 636 (8.0) |
| Alcohol intake frequencya | |
| Daily or almost daily | 22 143 (16.6) |
| 3 or 4 times/week | 28 766 (21.6) |
| 1 or 2 times/week | 35 594 (26.7) |
| 1–3 times/month | 17 321 (13.0) |
| Special occasions only | 18 928 (14.2) |
| Never | 10 435 (7.8) |
| Townsend Deprivation Index | –1.7 (2.8) |
| Blood glucose (mmol/L) | 5.0 (0.7) |
| eGFR (mL/min/1.73 m2) | 89.9 (12.9) |
a
Categorical variables for which data are presented as count (%) rather than mean (SD).
eGFR, estimated glomerular filtration rate.