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Table 3 RTS,S Malaria vaccine in Mozambican children, 2003–2005

From: Evaluation of the impact of disease prevention measures: a methodological note on defining incidence rates

Trial arm Sample size Number of event Person-year at riska Events/PYAR Events/observation timeb
Control 745 384 972.1 0.395 0.383
RTS,S 745 310 1004.5 0.309 0.301
Overall 1490 694 1976.6 0.351 0.342
  1. aObservation time minus malaria curative treatment time
  2. bEstimated using Eq. 3