BW Infant deaths Infant mortality rate Odds ratio [95% CI]
<1000 ≥1000 <1000 ≥ 1000 <1000 ≥ 1000

Maternal age

<25 13 1 216.7 3.5 1.32 [0.66-2.63] 0.85 [0.10-7.12]
25-29 45 20 209.3 10.7 1.26 [0.81-1.98] 2.62 [1.05-6.54]
30-34 49 31 173.1 9.9 1.00 Reference 2.43[1.01-5.83]
35-39 28 6 189.2 4.1 1.11 [0.67-1.86] 1.00 Reference
≥40 4 3 181.8 32.6 1.06 [0.34-3.27] 8.17 [2.01-33.20]

Gestational age

<24 49 0 720.6 - 27.81 [14.08-54.92] -
24-25 43 0 344.0 - 5.65 [3.22-9.94] -
26-27 23 8 84.9 114.3 1.00 Reference 16.0 [7.3-35.1]
≥28 24 54 90.9 8.0 1.08 [0.59-21.96] 1.00 Reference
Table 7: Infant Mortality Rates between Birth Weight (BW) and Maternal Age or Gestational Age in Triplets, 1999-2008.
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