Table 3.
Apgar score at 1 and 5 min and rate ratios for special needs status among singleton term live births in British Columbia, Canada
| Apgar score | Total number of children | Special needs | ||
| No. with outcome (%) | Rate ratio (95% CI) | |||
| Crude | Adjusted* | |||
| 1 min Apgar | 148 699 | 3644 (2.5) | ||
| 0 | 22 | <5 (4.6) | 1.94 (0.28 to 13.4) | 1.44 (0.23 to 8.97) |
| 1 | 463 | 26 (5.6) | 2.40 (1.55 to 3.72) | 2.23 (1.44 to 3.46) |
| 2 | 1054 | 45 (4.3) | 1.82 (1.26 to 2.63) | 1.72 (1.19 to 2.48) |
| 3 | 1743 | 53 (3.0) | 1.30 (0.91 to 1.84) | 1.23 (0.86 to 1.74) |
| 4 | 2554 | 69 (2.7) | 1.15 (0.83 to 1.60) | 1.09 (0.79 to 1.52) |
| 5 | 4032 | 136 (3.4) | 1.44 (1.09 to 1.91) | 1.39 (1.05 to 1.85) |
| 6 | 6894 | 191 (2.8) | 1.18 (0.90 to 1.55) | 1.16 (0.89 to 1.52) |
| 7 | 11 903 | 298 (2.5) | 1.07 (0.83 to 1.38) | 1.06 (0.82 to 1.37) |
| 8 | 38 300 | 946 (2.5) | 1.06 (0.83 to 1.34) | 1.07 (0.84 to 1.35) |
| 9 | 78 701 | 1808 (2.3) | 0.98 (0.78 to 1.24) | 1.00 (0.79 to 1.26) |
| 10 | 3033 | 71 (2.3) | 1.00 (reference) | 1.00 (reference) |
| P for trend | <0.001 | |||
| Per one unit of Apgar | 0.99 (0.98 to 0.99) | |||
| 5 min Apgar | ||||
| 0 | 17 | <5 (<29.4) | 2.51 (0.37 to 16.8) | 2.59 (0.41 to 16.3) |
| 1 | 15 | <5 (<33.3) | 5.69 (1.56 to 20.7) | 5.13 (1.45 to 18.1) |
| 2 | 28 | <5 (<17.9) | 6.10 (2.46 to 15.2) | 5.17 (2.01 to 13.3) |
| 3 | 83 | 9 (10.8) | 4.63 (2.49 to 8.61) | 3.78 (2.03 to 7.02) |
| 4 | 103 | 7 (6.8) | 2.90 (1.41 to 5.95) | 2.59 (1.25 to 5.35) |
| 5 | 289 | 8 (2.8) | 1.18 (0.59 to 2.35) | 1.10 (0.56 to 2.16) |
| 6 | 928 | 36 (3.9) | 1.66 (1.19 to 2.30) | 1.49 (1.07 to 2.06) |
| 7 | 2342 | 74 (3.2) | 1.35 (1.07 to 1.70) | 1.28 (1.01 to 1.61) |
| 8 | 7597 | 225 (3.0) | 1.26 (1.09 to 1.46) | 1.20 (1.03 to 1.38) |
| 9 | 100 281 | 2411 (2.4) | 1.03 (0.95 to 1.11) | 1.01 (0.94 to 1.09) |
| 10 | 37 016 | 867 (2.3) | 1.00 (reference) | 1.00 (reference) |
| P for trend | <0.001 | |||
| Per one unit of Apgar | 0.98 (0.97 to 0.99) | |||
*Adjusted for child’s sex (male vs female), child’s age at EDI completion (years), socioeconomic status (first quintile, second quintile, third quintile, fourth quintile vs fifth quintile), child’s first language (other vs English), birth order (2, 3, +4 vs 1), birth weight-for-gestational age (large, small vs appropriate) and gestational age (weeks).
EDI, Early Development Instrument.