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Table 4 Association between oral polio vaccine (OPV) immunisation coverage and mortality rates of sudden infant death syndrome (SIDS) (United States, 1975–2009)

From: Association between sudden infant death syndrome and diphtheria-tetanus-pertussis immunisation: an ecological study

 

Estimate [per 10% increase]

IRR (95% CI)

OPV immunisation coverage

−0.07

0.94 (0.89, 0.98)

Infant sleep position (supine)

−0.12

0.89 (0.86, 0.92)

  1. CI, confidence interval; IRR, incidence rate ratio.