Variables

Study group n (%)

Control n (%)

X2

p-value

Cough

Yes

No

69 (72.6)

26 (27.4)

11 (11.6)

84 (88.4)

7.552

0.001

Phlegm production

Yes

No

21 (22.1)

74 (77.9)

15 (15.8)

80 (84.2)

1.234

0.267

Breathless while walking on level ground or up a slight hill

Yes

No

21 (22.1)

74 (77.9)

9 (9.4)

86 (90.6)

5.700

0.017

Had wheezing attack at any time in past 12 months

Yes

No

14 (14.7)

81 (85.3)

9 (9.4)

86 (90.6)

1.237

0.266