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. 2025 Jul 29;15:27614. doi: 10.1038/s41598-025-06536-2

Table 1.

Baseline characteristics of the study population based on the primary vaccine dose (n = 540).

Vaccine type
Variables ChadOx1 (n = 158) BNT162b2 (n = 138) AD26.COV2.S (n = 244)
Mean age (± SD) years 36.3 ± 12.8 36.4 ± 13.0 37.1 ± 13.6
Age group n(%)

  18–55 years

  56–65 years

147(93.0)

11(7.0)

125(90.6)

13(9.4)

218(89.3)

26(10.7)

Sex
  Female 79(50) 82(59.4) 161 (66)
  Male 79(50) 56(40.6) 83(34)
Marital status
  Married 84(53.2) 72(52.2) 135(55.3)
  Unmarried 74(46.8) 66(47.8) 109 (44.7)
Educational level
  None 10 (6.3) 5(3.6) 20 (8.2)
  Primary 20 (12.7) 29(21) 41(16.8)
  Secondary 81(51.3) 67(48.6) 126(51.6)
  Tertiary 47 (29.7) 37(26.8) 57(23.4)
  Occupation
  Employed 116(73.4) 107(77.5) 194 (79.5)
  Unemployed 42(26.6) 31(22.5) 50(20.5)
Average income
  1–30,000 67(42.4) 62(44.9) 136(55.7)
  Above 30,000 34(21.5) 25(18.1) 46(18.9)
Seropositivity baseline
  Negative 56(35.4) 57(41.3) 61(25)
  Positive 101(63.9) 81(58.7) 183(75)