Table 3.

Frequency of respiratory symptoms in the children studied. Results are shown as frequency and percentage.

	Group 1 (n= 89)	Group 2 (n= 90)	Group 3 (n= 89)	Group 4 (n= 90)
Frequent cough
No	84 94.38	81 90.00	78 87.64	78 86.66
Yes	5 5.61	9 10.00	11 12.35	12 13.33
Chronic cough
No	85 95.50	87 96.66	87 97.75	85 94.44
Yes	4 4.49	3 3.33	2 2.24	5 5.55
Frequent phlegm
No	82 92.13	77 85.55	84 94.38	80 88.88
Yes	7 7.86	13 14.44	5 5.61	10 11.11
Chronic phlegm
No	86 96.62	84 93.33	87 97.75	86 95.55
Yes	3 3.37	6 6.66	2 2.24	4 4.44
Frequent wheezing
No	83 93.25	83 92.22	87 97.75	84 93.33
Yes	6 6.74	7 7.77	2 2.24	6 6.66
Chronic wheezing
No	86 92.62	88 97.77	87 97.75	88 97.77
Yes	3 3.37	2 2.22	2 2.24	2 2.22
Shortness of breath grade I
No	89 100	90 100	89 100	90 100
Yes	0	0	0	0
Number of respiratory diseases per year
0	4 4.49	2 2.22	4 4.49	4 4.44
1-3	69 77.52	72 80.00	68 76.40	69 76.66
4-7	15 16.85	16 17.78	18 20.22	15 16.66
8 -10	1 1.12	0	0	2 2.22

^*p <0.05

^**p< 0.001: Ttest or Mann Whitney test (Group 1 compared with Groups 2-4)