Table 2

Snoring and respiratory symptoms, asthma and other allergic conditions

Non-snoring
(N = 586)
 Infrequent snoring
(N = 248)
 Habitual snoring
(N = 151)

n
 %
 n
 %
 n
 %
 P
Phlegm with a cold
 145
 24.7
 97
 39.1
 66
 44.0
 <0.001
Phlegm without a cold
 38
 6.5
 31
 12.5
 25
 16.6
 <0.001
Chronic productive cough
 12
 2.1
 13
 5.2
 14
 9.3
 <0.001
Wheeze during or after exercise
 71
 12.1
 54
 21.8
 37
 24.5
 <0.001
Wheeze without exercise
 47
 8.0
 27
 10.9
 26
 17.2
 <0.001
Any current wheeze
 110
 18.8
 83
 33.5
 59
 39.3
 <0.001
Dry cough at night without a cold
 134
 22.9
 98
 39.7
 66
 43.7
 <0.001
Ever asthma
 140
 23.9
 86
 34.7
 56
 37.1
 <0.001
Current asthma
 83
 14.3
 62
 25.0
 36
 24.2
 <0.001
Allergic rhinitis or hay fever
 217
 37.6
 123
 49.6
 92
 61.7
 <0.001

Zhang et al. Respiratory Research 2004 5:19   doi:10.1186/1465-9921-5-19
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