Effect of traffic-related air pollution on cough in adults with polymorphisms in several cough-related genes

Respiratory Research

Table 1 Participant characteristics

	Age (years)	Sex	GRS	Smoking history (pack-years)	Time since quitting smoking (years)	FEV₁/FVC	FEV1 (L)	FEV1 (% Predicted)	DE cough count	FA cough count
1	42	F	12	0	–	86	2.41	92	440	98
2	56	F	6	0	–	81	2.61	103	43	31
3	58	M	8	0	–	75	4.46	133	232	152
4	72	F	9	0	–	80	3.31	162	64	47
5	50	M	6	15	16	79	4.05	106	41	44
6	56	M	5	50	8	74	3.43	113	20	11
7	70	M	6	90	19	72	2.52	93	69	52
8	66	F	7	24	16	54	1.87	86	13	42
9	67	M	2	52.5	11	49	2.62	76	0	5
10	70	F	6	12	33	48	1.79	88	109	159
11	70	M	9	19.5	16	64	2.44	89	116	214
12	75	M	6	7	41	67	3.11	116	60	84
13	80	M	10	10	30	54	2.33	97	57	31

Lung function data were measured after a bronchodilator (salbutamol) use during in-person screening. All participants were not current smokers. One pack-year is equivalent to smoking 1 pack (20 cigarettes) of cigarette every day for one year
M Male, F Female, GRS genetic risk score, COPD chronic obstructive pulmonary disease, FEV₁/FVC ratio of forced expiratory volume in one second to functional vital capacity; FEV₁% predicted, percent of predicted forced expiratory volume in 1 s; N/A not applicable

ISSN: 1465-993X