Grouping

Cases

Wound infection

Pulmonary infection

Respiratory tract infection

Infection rate

Group A

44

1 (2.27)

3 (6.82)

2 (4.55)

6 (13.64)

Group B

44

8 (18.18)

13 (29.55)

10 (22.73)

31 (70.45)

X²

6.065

7.639

6.175

29.151

p

0.013

0.005

0.013

<0.001