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Table 2 The proportion (%) of seropositive rates across different age groups

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

Age (year) Total Seropositivity
Diphtheria Tetanus Pertussis
N % 95% (CI) N % 95% (CI) N % 95% (CI)
61–65 104 101 97.1 93.8–100 90 86.5 79.8–93.2 53 51.0 41.2–60.8
66–70 99 96 97.0 93.5–100 83 83.8 76.4–91.2 57 57.6 47.6–67.5
71–75 92 88 95.7 91.4–99.9 72 78.3 69.7–86.9 48 52.2 41.8–62.6
76–80 70 69 98.6 95.8–100 63 90.0 82.8–97.2 44 62.9 51.3–74.4
81+ 65 64 98.5 95.4–100 51 78.5 68.3–88.7 38 58.5 46.2–70.7
Total 430 418 97.2 95.6–98.8 359 83.5 79.9–87.1 240 55.8 51.0–60.6
  1. CI confidence interval, N number of patients