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Table 1 Baseline characteristics of the study participants

From: The effect of maternal poliovirus antibodies on the immune responses of infants to poliovirus vaccines

Characteristics Group 1 Group 2 Group 3 Group 4 Group 5
N 109 125 127 124 124
Age—daysa 72.18 ± 8.93 73.00 ± 8.81 72.59 ± 8.81 72.12 ± 8.09 73.83 ± 7.89
Sex—no. (%)
 Male 49 (44.95) 68 (54.40) 65 (51.18) 61 (49.19) 63 (50.81)
 Female 60 (55.05) 57 (45.60) 62 (48.82) 63 (50.81) 61 (49.19)
  1. Group 1: low-dose Sabin IPV group. Group 2: medium-dose Sabin IPV group. Group 3: high-dose Sabin IPV group. Group 4: control Sabin IPV group. Group 5: control Salk IPV group
  2. aPlus–minus values are means ± SD