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Table 4 Fisher’s exact analysis for African American children excluding low birth weight

From: Measles-mumps-rubella vaccination timing and autism among young african american boys: a reanalysis of CDC data

  Total cohort Males only Females only
Age cut-off Relative risk 95% CI p-value Relative risk 95% CI p-value Relative risk 95% CI p-value
18 months 0.996 0.66-1.51 0.986 1.06 0.66-1.69 0.819 0.804 0.32-2.00 0.637
24 months 1.29 0.76-2.21 0.348 1.53 0.82-2.85 0.178 0.731 0.25-2.14 0.567
31 months* 1.85 0.91-3.79 0.0872 2.64 1.08-6.46 0.0280 --- --- ---
  1. *31 month cut-off was used as 36-months yielded results for African American males with <5 individuals per cell in the analysis.