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Table 4 Crude mortality rates due to natural causes in children with respect to gender and age group, from 2000–2011, and adjusted incidence rate ratios (IRR) for girls compared with boys

From: Gender-specific mortality in DTP-IPV- and MMR ± MenC-eligible age groups to determine possible sex-differential effects of vaccination: an observational study

Age group Boys Boys Girls Girls IRRa p-value
Number of deaths Mortality rate/10,000 person Number of deaths Mortality rate/10,000 person (95% CI)
(N = 7145) Years (95% CI) (N = 5605) Years (95% CI)
0-1 months 4578 32.1 (31.2-33.1) 3555 26.2 (25.3-27.0) 0.81 (0.78-0.85)  
2-13 months 1035 4.6 (4.3-4.8) 797 3.7 (3.4-3.9) 0.81 (0.74-0.89)  
14 months – 3 years 680 1.4 (1.3-1.5) 551 1.2 (1.1-1.3) 0.85 (0.76-0.95) 0.493b
4-8 years 552 0.7 (0.7-0.8) 441 0.6 (0.5-0.7) 0.84 (0.74-0.95) 0.868c
9-11 years 300 0.6 (0.5-0.6) 261 0.5 (0.5-0.6) 0.91 (0.77-1.07)  
       0.723d
  1. aAdjusted for calendar year.
  2. bp-value for interaction (df = 1) between age group and gender for 14 months – 3 years of age versus 2–14 months of age.
  3. cp-value for interaction (df = 1) between age group and gender for 4–8 years of age versus 14 months – 3 years of age.
  4. dp-value for interaction (df = 4) between age group and gender for all age groups.