Table 1

Maternal and birth characteristics according to Apgar score at 5 min among singleton term live births, British Columbia, 1993–2009

Maternal and birth characteristicsTotalApgar 0–3 (n=147)Apgar 4–6 (n=1328)Apgar 7 (n=2375)Apgar 8 (n=7666)Apgar 9 (n=101 191)Apgar 10 (n=37 374)
No. (%)%%%%%%
 Total150 081 (100)
Maternal age (years)
 ≤196170 (4.11)0.151.411.935.8064.1726.55
 20–2424 637 (16.42)0.091.111.775.8864.8326.32
 25–2943 832 (29.21)0.100.881.645.1966.6625.54
 30–3447 332 (31.54)0.100.801.504.7668.4524.39
 ≥3528 081 (18.71)0.090.721.394.7369.8923.17
 Missing29 (0.02)0<17.24<17.24<17.2458.6231.03
Socioeconomic status
  Fifth quintile (highest)27 519 (18.34)0.100.901.645.0066.8825.47
  Fourth quintile31 282 (20.84)0.110.831.695.3866.7925.21
  Third quintile30 939 (20.61)0.100.861.655.1867.4724.74
  Second quintile31 266 (20.83)0.060.841.485.0867.7324.80
  First quintile (lowest)28 889 (19.25)0.121.001.454.8868.2524.30
 Missing186 (0.12)0<2.69<2.693.2366.1328.49
Married
 Yes103 099 (68.70)0.090.781.474.7368.4324.49
 No43 374 (28.90)0.121.131.856.0164.9325.95
 Missing3608 (2.40)0.170.891.474.9368.6323.92
Infant’s sex
 Female73 809 (49.18)0.080.781.464.9167.1725.61
 Male76 272 (50.82)0.120.991.705.3067.6724.22
Birth order
 167 516 (44.99)0.121.252.096.1367.9222.49
 256 025 (37.33)0.090.631.244.3267.5126.22
 319 239 (12.82)0.070.461.054.1366.6627.63
 ≥47301 (4.86)<0.070.560.994.3464.1729.91
Gestational age (weeks)
 378966 (5.97)0.101.082.026.8868.0221.89
 3825 821 (17.20)0.050.741.374.6768.2124.96
 3937 408 (34.03)0.090.761.324.3668.5724.89
 4051 079 (34.03)0.100.821.655.0566.3126.08
 4125 040 (16.68)0.151.221.876.0867.3823.29
 42–441767 (1.18)<0.281.582.096.5161.3528.3
Birth weight-for-gestational age
 Appropriate121 035 (80.65)0.090.841.514.9667.4225.18
 Small11 581 (7.72)0.191.352.206.1667.0423.06
 Large17 445 (11.62)0.080.851.655.4767.7624.18
 Missing20 (0.01)<25.00<25.000040.0050.00
Child’s age at EDI data collection (years)
 Mean (SD)5.70 (0.32)5.67 (0.30)5.65 (0.30)5.66 (0.30)5.66 (0.30)5.65 (0.30)5.65 (0.30)
  • EDI, Early Development Instrument.