TABLE 4.

Matched general health scores and measures and report of weight and exercise

	Total NHWS respondents		Respondents with CC		Matched* respondents without CC		p-value*
n	15 020		739		2194
	Mean	SD	Mean	SD	Mean	SD
CCI	0.87	1.31	1.16	1.39	0.77	1.27	0.000*
CCI–modified (without COPD)	0.73	1.23	0.80	1.26	0.70	1.21	0.068
PHQ-9 score¶	6.39	6.15	8.97	6.49	5.52	5.78	0.000*
GAD-7 score¶	4.73	4.72	6.75	5.15	4.06	4.36	0.000*
SF-12 physical component score+	46.33	10.11	42.75	9.52	47.53	10.02	0.000*
SF-12 mental component score+	46.27	10.77	42.75	10.45	47.53	10.59	0.000*
BMI§	27.29	6.51	27.93	7.03	27.08	6.31	0.004*
Numbers of days of vigorous exercise in the past monthƒ	5.51	7.53	4.98	7.27	5.69	7.61	0.023*

BMI: body mass index; CC: chronic cough; CCI: Charlson Comorbidity Index; COPD: chronic obstructive pulmonary disease; GAD-7: Generalized Anxiety Disorder questionnaire, 7-item; NHWS: National Health and Wellness Survey; PHQ-9: Patient Health Questionnaire, 9-item; sd: standard deviation; SF-12: Medical Outcomes Study 36-item Short Form Survey v2. *: t-test or chi-square statistic is significant at the 0.05 level. ^#: propensity score matched on age, gender, CCI modified to exclude COPD, marital status, household income, interaction term of marital status×household income; using 1:3 nearest neighbour on the logit, caliper=0.25. ^¶: PHQ-9 and GAD-7 are validated instruments to assess depressive symptoms over the prior 2 weeks (score range 0–27) and severity of generalised anxiety symptoms over the prior 2 weeks (score range 0–21), respectively. ⁺The physical and mental health component summary scores were calculated with a mean score set at 50 and a standard deviation at 10; higher scores represent better health. ^§: BMI was collected for a subset of respondents who reported their height and weight, respectively N=2824 out of 2930; 707 out of 736; and 2117 out of 2194. BMI between 25 and <30.0 kg·m⁻² indicates overweight. ^ƒ: the question was “How many days in the past month did you exercise vigorously for at least 20 min for the purpose of improving of maintaining your health, with the purpose of losing weight, or for enjoyment?”.