Table 4 Tuberculosis incidence and relative risk among TBI patients with different Charlson’s Comorbidity Index groups.

From: The risk of pulmonary tuberculosis after traumatic brain injury

 

Mild-CCI

Moderate-CCI

Severe-CCI

Moderate versus mild

Severe versus mild

No. of TB

Incidence rate of TB per 10,000

No. of TB

Incidence rate of TB per 10,000

No. of TB

Incidence rate of TB per 10,000

HR (95% CI)a

p value

HR (95% CI)a

p value

Overall

551

73.62

121

169.42

30

147.64

1.52 (1.24–1.87)

 < 0.0001

1.24 (0.85–1.80)

0.2680

Age at entry

< 20

25

18.73

3

66.82

0

0.00

1.92 (0.50–7.28)

0.3396

 

20–34

71

41.26

5

72.78

1

46.95

0.96 (0.37–2.49)

0.9388

0.65 (0.09–4.72)

0.6659

35–49

104

69.07

11

119.57

2

65.79

1.45 (0.76–2.78)

0.2636

0.75 (0.18–3.09)

0.6919

50–64

113

79.60

24

176.99

4

88.11

1.94 (1.23–3.05)

0.0041

0.86 (0.32–2.36)

0.7731

65–79

162

149.90

54

239.04

12

202.70

1.65 (1.20–2.26)

0.0018

1.32 (0.73–2.39)

0.3538

≥ 80

76

179.92

24

163.15

11

337.42

1.06 (0.67–1.69)

0.7983

1.91 (1.01–3.64)

0.0481

Sex

Male

462

91.83

95

200.30

23

168.50

1.45 (1.15–1.83)

0.0015

1.16 (0.76–1.78)

0.4829

Female

89

36.28

26

108.38

7

104.95

1.83 (1.15–2.90)

0.0102

1.53 (0.70–3.36)

0.2873

  1. CCI Charlson’s comorbidity index, TB tuberculosis, HR hazard ratio, CI confidence interval.
  2. aAdjusted by the variables of age, gender, the length of stay, and the length of ICU stays, but excluding the stratified variable in the model.