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Table 2 Demographic characteristics at study entry by study group

From: Baseline incidence of meningitis, malaria, mortality and other health outcomes in infants and young sub-Saharan African children prior to the introduction of the RTS,S/AS01E malaria vaccine

  6 to 12 weeks age-group (N = 7248) 5 to 17 months age-group (N = 7081) Overall (N = 14,329)
Age at informed consent (months)
 Mean ± SD 1.7 ± 0.3 7.7 ± 5.1 4.7 ± 4.7
 Range 0.4–3.0 0.4–18.0 0.4–18.0
Gender, n (%)
 Female 3585 (49.5) 3484 (49.2) 7069 (49.3)
 Male 3663 (50.5) 3597 (50.8) 7260 (50.7)
Neighbourhood of residence, n (%)
 Urban 1320 (18.2) 920 (13.0) 2240 (15.6)
 Semi-rural 1225 (16.9) 1119 (15.8) 2344 (16.4)
 Rural 4703 (64.9) 5042 (71.2) 9745 (68.0)
Distance to health care facility, n (%)
 < 5 km 6588 (90.9) 6370 (90.0) 12,958 (90.4)
 5– < 10 km 543 (7.5) 496 (7.0) 1039 (7.3)
 10– < 20 km 84 (1.2) 149 (2.1) 233 (1.6)
 20– < 30 km 17 (0.2) 42 (0.6) 59 (0.4)
 > 30 km 16 (0.2) 24 (0.3) 40 (0.3)
Closest health care facility, n (%)
 Primary health care facility 5135 (70.9) 5165 (72.9) 10,300 (71.9)
 Hospital 2113 (29.2) 1916 (27.1) 4029 (28.1)
  1. According-to-protocol cohort
  2. N, total number of study participants by study site; n, number of study participants in each category; SD: standard deviation