Skip to main content

Table 1 Basic information, clinical symptoms and vaccination history of the death group and nondeath group

From: Risk factors associated with death in infants <120 days old with severe pertussis: a case-control study

Characteristic

Deaths(n = 15)

Nondeaths(n = 44)

 

NO. of Patients

NO.(%)

NO. of Patients

NO.(%)

P Value

age

 ≤ 1 month

1

6.67%

1

2.27%

0.417

 1-2 month

6

40%

19

43.18%

0.829

 2-3 month

4

26.67%

13

29.55%

0.832

 3-4 month

4

26.67%

11

25.00%

0.898

Male sex

6

 

26

 

0.2

weight (kg)

 

5.13 ± 1.12

 

5.27 ± 1.07

0.135

premature

4

26.67%

6

13.64%

0.245

Birth weight (kg)

 

2.96 ± 4.41

 

3.17 ± 5.07

0.149

Vaccination history

2 (1 dose)

 

0

  

symptoms

 fever

9

60.00%

19

43.18%

0.26

 paroxysmal coughing

14

93.33%

43

97.70%

0.417

 whoop

11

73.30%

23

52.30%

0.154

 apnoea

12

80.00%

14

31.80%

0.001

 cyanosis

15

100%

44

100%

 

 Laboratory confirmed

15

100%

44

100%

 
  1. Prematurity was defined as birth at < 37 weeks’ gestation
  2. Only 2 infants had received 1 dose of the vaccine (DTaP) in the death group
  3. Fever was defined as a tympanic or axillary temperature >38 °C