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Table 3 The geometric mean titer (GMT) level for all diseases across the different age groups enrolled in this study

From: Seroprevalence of an antibody against diphtheria, tetanus, and pertussis among the elderly in Khon Kaen, Thailand

Age (years)

Total

GMT level (IU/ml)

Diphtheria

Tetanus

Pertussis

N

GMT

95% CI

p value

N

GMT

95% CI

p value

N

GMT

95% CI

p value

61–65

104

101

0.11

0.09–0.15

0.59

90

0.45

0.28–0.72

0.15

53

12.36

10.24–14.93

0.07

66–70

99

96

0.13

0.09–0.17

 

83

0.48

0.31–0.76

 

57

12.40

10.18–15.11

 

71–75

92

88

0.11

0.09–0.14

 

72

0.24

0.14–0.39

 

48

12.46

10.27–15.13

 

76–80

70

69

0.15

0.11–0.20

 

63

0.34

0.19–0.61

 

44

17.81

13.68–23.17

 

81+

65

64

0.11

0.08–0.15

 

51

0.24

0.12–0.44

 

38

15.08

11.56–19.68

 

Total

430

418

0.12

0.11–0.14

 

359

0.35

0.28–0.44

 

240

13.67

12.42–15.06

 
  1. GMT geometric mean titer
  2. Using the one-way-ANOVA