TABLE 1

Demographics of chronic cough at baseline^#

	No chronic cough		Chronic cough
Subjects	25 233		4739
Age years		59.2±0.04		61.5±0.18
Sex
Male	12 184	84.8±0.37	2526	15.2±0.37
Female	13 049	87.3±0.31	2213	12.7±0.31
BMI kg·m⁻²	25 139	27.7±0.04	4701	28.6±0.11
Underweight <20	171	80.4±3.24	42	19.6±3.24
Normal 20–25	7644	88.0±0.41	1190	12.0±0.41
Overweight 25–30	10 221	86.7±0.37	1815	13.3±0.37
Obese >30	7103	83.0±0.49	1654	17.0±0.49
Smoking status
Never	13 729	89.1±0.30	1953	10.9±0.30
Former	9755	86.5±0.38	1803	13.5±0.38
Current	1605	65.8±1.17	953	34.2±1.17
Smoking packs per year	24 952	6.7±0.10	4680	13.2±0.35
Provinces
Alberta	2445	85.7±0.76	493	14.3±0.76
British Columbia	5147	84.2±0.51	1075	15.8±0.51
Manitoba	2548	82.9±0.75	552	17.1±0.75
Newfoundland and Labrador	1880	86.0±0.80	331	14.0±0.80
Nova Scotia	2547	84.7±0.70	511	15.3±0.70
Ontario	5320	84.2±0.49	1087	15.8±0.49
Quebec	5346	89.6±0.42	690	10.4±0.42
Ethnicity
White only	22 948	86.0±0.25	4359	14.0±0.25
Black only	186	94.5±1.58	17	5.5±1.58
Asian (East and West)	355	91.7±1.87	31	8.3±1.87
South Asian	245	92.0±1.84	25	8.0±1.84
Arab	79	93.0±3.15	8	7.0±3.15
Others	1213	83.2±1.22	254	16.8±1.22
Country of birth
Canada	20 579	85.5±0.27	3980	14.5±0.27
USA	568	86.4±1.48	116	13.6±1.48
South, Central America and Caribbean	378	92.0±1.49	41	8.0±1.49
Europe/Oceania	2846	86.6±0.69	522	13.4±0.69
Africa	257	92.3±1.71	27	7.7±1.71
Asia	601	93.2±1.22	52	6.8±1.22

Data are presented as n, mean±se or %±se. BMI: body mass index. ^#: n=29 972.