Table 2.
Annual hospital admissions and costs by BMI
|
Hospital admissions |
Annual hospital care costs |
|||
|---|---|---|---|---|
| Admissions per 1000 women-years | Difference in admission rate* | Annual costs (2012 £) | Difference in costs* | |
| 18·5 to <20 | 342 (331 to 354) | 6·6% (3·2 to 10·1) | 637 (611 to 663) | 12·4% (7·9 to 17·0) |
| 20 to <22·5 (reference) | 321 (316 to 326) | 0·0% (−1·5 to 1·5) | 567 (556 to 577) | 0·0% (−1·7 to 1·7) |
| 22·5 to <25 | 334 (330 to 338) | 4·0% (2·8 to 5·2) | 593 (584 to 601) | 4·6% (3·3 to 5·9) |
| 25 to <27·5 | 356 (351 to 361) | 10·8% (9·5 to 12·1) | 641 (632 to 651) | 13·2% (11·8 to 14·7) |
| 27·5 to <30 | 383 (377 to 389) | 19·3% (17·7 to 20·9) | 715 (703 to 727) | 26·1% (24·3 to 28·0) |
| 30 to <35 | 416 (410 to 422) | 29·6% (27·9 to 31·3) | 808 (794 to 821) | 42·5% (40·4 to 44·7) |
| 35 to <40 | 473 (462 to 483) | 47·1% (43·9 to 50·4) | 982 (955 to 1009) | 73·3% (68·9 to 77·8) |
| ≥40 | 530 (511 to 549) | 65·1% (59·4 to 71·1) | 1220 (1170 to 1270) | 115·3% (106·8 to 124·2) |
Data are mean (99% CI), with floating CIs for results by BMI category. All models are adjusted for age, region of recruitment, deprivation, educational qualifications, parity, age at first birth, smoking, alcohol intake, Hospital Episode Statistics data year, and proportion of Hospital Episode Statistics year with contributed data. BMI=body-mass index.
*
Differences are presented as percentage differences compared with BMI 20 kg/m2 to <22·5 kg/m2.