Table 1 Baseline characteristics of the participants stratified by type of boost vaccination

From: Safety, immunogenicity and protective effectiveness of heterologous boost with a recombinant COVID-19 vaccine (Sf9 cells) in adult recipients of inactivated vaccines

Characteristic

All (n = 85)

Heterologous boost with Sf9 cells vaccine (n = 44)

Homologous boost with CoronaVac vaccine (n = 41)

p value

Age, years

0.363

 Median (Min, Max)

49 (23, 70)

49 (25, 67)

46 (23, 70)

 

Age subgroup, n (%)

0.039

 18–59 years

67 (78.80)

35 (79.50)

32 (78.05)

 

 ≥60 years

18 (21.20)

9 (20.40)

9 (21.95)

 

Sex, n (%)

0.881

 Male

40 (47.10)

22 (50.0)

18 (43.90)

 

 Female

45 (52.90)

22 (50.0)

23 (56.10)

 

Height, cm

0.838

 Median (Min,Max)

164.0 (136.5, 180.0)

164.0 (136.5, 180.0)

164.0 (149.0, 179.5)

 

Weight, kg

0.996

 Median (Min Max)

61.4 (42.0, 98.5)

61.8 (42.0, 82.0)

61.1 (48.5, 98.5)

 

BMI, kg/m2

   

0.883

 Median (Min, Max)

23.7 (17.5, 33.3)

23.7 (17.5, 33.0)

23.7 (18.3, 33.3)

 

Preexisting co-morbidities*, n (%)

0.043

 Yes

6 (7.06)

1 (2.27)

5 (12.19)

 

 No

79 (92.94)

43 (97.73)

36 (87.80)

 

Time between third vaccination and the fourth booster doses in the present study, days

0.178

 Mean (±SD)

286.09 ( ± 44.57)

277.84 ( ± 48.19)

294.95( ± 38.97)

 

 Median (Min, Max)

283 (220, 351)

273 (220, 351)

313 (222, 336)

 
  1. *Two participants had hypertension, two were chronically infected with hepatitis B virus, one had bilateral renal calculus, one had diabetes. Min minimum; Max maximum, SD standard deviation, BMI body mass index