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Table 3 Comparison of symptoms between cases and controls.

From: Clinically diagnosed childhood asthma and follow-up of symptoms in a Swedish case control study

  Case (n = 158) Control (n = 171)  
  n % n % p-value
A. Wheezing or whistling in the chest at any time in the past
   Yes 116 73.4 40 23.4 <0.0001
   No 42 26.6 131 76.6  
B. Wheezing or whistling in the chest in the last 12 months
   Yes 42 26.6 10 5.8 <0.0001
   No 116 73.4 161 94.1  
C. How many attacks of wheezing in the last 12 months
   None 113 71.5 161 94.1 <0.0001
   1–3 25 15.8 5 2.9  
   4–12 18 11.3 5 2.9  
   More than 12 2 1.3 0 0.0  
D. Disturbed sleep due to wheezing in the last 12 months
Never woken with wheezing 137 86.7 163 95.3 0.08
Less than one night per week 20 12.6 6 3.5  
One or more nights per week 1 0.6 2 1.1  
E. Limiting speech to only one or two words at a time between breaths last 12 months
   Yes 5 3.1 3 1.7 0.40
   No 153 96.8 168 98.2  
F. Has the child's chest sounded wheezy after or during exercise last 12 months
   Yes 42 26.6 9 5.2 <0.0001
   No 116 73.4 162 94.7  
G. Dry cough at night (not associated with a cold or chest infection) last 12 months
   Yes 52 32.9 19 11.1 <0.0001
   No 106 67.1 152 88.9  
H. Blocked in chest or mucous cough ≥ 4 days/week during in total ≥ 3 months per year
   Yes 11 6.9 2 1.1 0.007
   No 147 93.0 169 98.9  
I. Problem with sneezing or a runny or blocked nose without a cold or the flu
   Yes 70 44.3 37 21.6 < 0.0001
   No 88 55.7 134 78.4  
J. Itchy rash coming and going for at least 6 months
   Yes 49 31.0 35 20.5 0.03
   No 109 68.9 136 79.5