Table 4.

Statistical characteristics for QoL in the “Activity limitation” domain of the AQLQ in relation to clinical factors

Category	n	Me	Lower quartile	Upper quartile	P-value
Nicotine use
Nonsmokers	53	39	33	50	0.176
Current smokers	41	37	27	41
Past smokers	6	37	37	73
Dominant symptom of asthma
Daytime dyspnea	88	37	27	47	0.030
Morning cough	9	50	38	59
Nighttime dyspnea	3	23	22	63
Frequency of acute asthma exacerbations
1 every several months	3	37	37	38	0.086
1 per month	11	50	44	64
1 per week	5	36	33	41
2–3 per week	20	37	30	47
Every day (daytime)	36	30	21	42
Every day (nighttime)	23	38	36	51
Allergy to ≥1 allergen
No allergies	37	41	36	55	0.007
Allergy	63	35	27	47
Frequency of AC visits
Fewer	25	43	36	56	0.001
3 per year	10	47	37	55
6 per year	19	36	27	41
1 per month	27	35	27	44
2 per month	19	36	16	41
Number of hospitalizations
1–2	46	41	36	53	0.001
3–5	14	43	27	55
6–10	15	37	16	41
More	25	32	27	36
Histamine test
Negative	27	37	30	57	0.137
Positive	73	37	27	47
Comorbidities
None	38	37	30	44	0.597
Present	62	37	27	50

Note: Data in bold indicates statistical significance.

Abbreviations: QoL, quality of life; AQLQ, Asthma Quality of Life Questionnaire; Me, median; AC, allergy clinic.