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Table 1 Demographic and status of anti-DT and anti-PT IgG in the sera of subjects among different age groups

From: Seroprevalence of diphtheria and pertussis immunoglobulin G among children with pneumonia in Ji’nan, China

  

Anti-DT

Anti-PT

N

Positive rate (≥0.1 IU/ml) (95% CI, %)

Concentration and 95% CI (IU/ml)

Positive rate (≥40 IU/ml) (95% CI, %)

Concentration and 95% CI (IU/ml)

Gender

 Male

324

48.15 (42.76–53.58)

0.37 (0.32–0.43)

8.03 (5.53–11.50)

13.44 (9.20–17.67)

 Female

160

50.00 (42.34–57.66)

0.40 (0.31–0.49)

5.63 (2.99–10.34)

11.43 (6.32–16.54)

p

 

0.7014

0.4594

0.3376

0.7663

Age

  < 6 m

133

34.59 (27.04–43.0)

0.19 (0.14–0.24)

8.27 (4.68–14.20)

11.76 (7.88–15.65)

 6 m- < 3y

159

68.55 (60.97–75.26)

0.56 (0.47–0.66)

7.55 (4.37–12.73)

12.59 (7.72–17.46)

 3y- < 6y

100

40.00 (30.94–49.80)

0.62 (0.45–0.79)

5.00 (2.15–11.18)

10.34 (4.02–16.66)

 ≥6y

92

45.65 (35.88–55.80)

0.44 (0.31–0.57)

7.61 (3.73–14.88)

12.32 (5.47–19.17)

p

 

< 0.0001

< 0.0001

0.7776

< 0.0001

 Total

484

48.97 (44.54–53.41)

0.38 (0.33–0.43)

7.23 (5.25–9.89)

11.85 (9.21–14.48)