Main outcome measures stratified by birth weight and comparing cases with hospital controls
| Cases | Hospital controls | |
|---|---|---|
| Standard deviation is shown for means and interquartile range for medians. GP controls not included as all were term and not low birth weight. | ||
| IQ, Intelligence quotient; mABC, movement assessment battery for children; GP, general practitioner. | ||
| Infants of birth weight ≥2500 g | (n=73) | (n=79) |
| Birth weight mean (g) | 3264 (434) | 3220 (383) |
| Gest age median (weeks) | 40 (38–40) | 40 (39–40) |
| IQ mean | 90.35 (17.8) | 99.89 (15.0) |
| mABC score median | 6.5 (3.5–12.5) | 4.5 (2.6–7.5) |
| Mod/severe outcome | 12% | 2.5% |
| Infants of birth weight 1500–2499 g | (n=29) | (n=25) |
| Birth weight mean (g) | 1997 (306) | 1949 (318) |
| Gest age median (weeks) | 33.6 (30.8–35.2) | 33.8 (31.0–37.0) |
| IQ mean | 82.74 (25.8) | 99.16 (15.7) |
| mABC score median | 7.5 (4.6–22.3) | 6.25 (3.5–11.0) |
| Mod/severe outcome | 31% | – |
| Infants of birth weight ≤1499 g | (n=9) | (n=9) |
| Birth weight mean (g) | 1228 (179) | 1218 (181) |
| Gest age median (weeks) | 29 (28.0–30.2) | 29 (28.0–29.5) |
| IQ mean | 85.40 (25.8) | 96.55 (11.4) |
| mABC score mean | 9.3 (7.35) | 10.5 (6.1) |
| Mod/severe outcome | 44% | – |