TABLE 2

Unadjusted analysis of respiratory symptoms by nocturnal gastro-oesophageal reflux (nGOR) and snoring status

No snoring or nGOROnly snoringOnly nGORSnoring and nGORp-value
Participants448483330494
Any respiratory symptom55.9%68.3%72.3%79.3%<0.001
 Wheeze22.2%31.6%32.9%40.4%<0.001
 Nocturnal chest tightness12.5%19.4%23.6%38.0%<0.001
 Breathlessness at rest6.4%10.3%12.2%14.9%<0.001
 Breathlessness after effort20.7%29.5%29.4%46.7%<0.001
 Nocturnal breathlessness6.8%13.2%12.9%23.9%<0.001
 Nocturnal cough29.8%36.8%45.7%54.3%<0.001
 Morning cough10.0%16.2%19.9%24.5%<0.001
 Morning phlegm11.5%19.5%17.6%37.6%<0.001

p-values were calculated for comparisons between all groups.