Table 1.

Demographic and clinical profile of patients by Indigenous status

	Non-Indigenous (n = 286)	Indigenous (n = 190)	p-value
Age (years) - mean (95% CI)	54.4 (52.2, 56.6)	46.7 (44.7, 48.7)	< 0.001
Sex (Females)	100 (42%)	110 (66%)	< 0.001
Presented in Wet season	135 (47%)	100 (53%)	0.246
Patients with multiple presentations (wet)	3 (2%)	14 (14%)	0.001
Median number of presentations (wet) (IQR)	2 (2, 2)	2 (2, 3)	0.757
Presented in Dry season	151 (53%)	90 (47%)	0.246
Patients with multiple presentations (dry)	4 (3%)	11 (12%)	0.003
Median number of presentations (dry) (IQR)	2 (2, 2.5)	2 (2, 2)	0.954
Presented in Both seasons	2 (1%)	7 (4%)	0.019
Patients with multiple presentations (overall)	7 (3%)	30 (16%)	< 0.001
Median number of presentations (overall) (IQR)	2 (2, 2)	2 (2, 2)	0.706
Current smoker	79 (50%)	112 (84%)	< 0.001
Former smoker	54 (34%)	15 (11%)	< 0.001
Non smoker	25 (16%)	6 (5%)	0.002
Missing*	128 (45%)	57 (30%)	0.001
Residence (nursing home or boarding accommodation)	128 (45%)	57 (30%)	0.157
Comorbidities
Airway disease^	74 (26%)	45 (24%)	0.589
OSA	12 (4%)	4 (2%)	0.215
Other respiratory condition	28 (10%)	17 (9%)	0.758
Any medical comorbidity	95 (33%)	60 (32%)	0.709

Data reported from first presentation of patient in the study period.

*Patients for whom smoking data was not reported.

^ Airway disease includes Asthma, Bronchiectasis and COPD

Abbreviations: CI Confidence interval, IQR Interquartile range, OSA obstructive sleep apnoea, COPD chronic obstructive pulmonary disease