Table 1

Demographic and clinical characteristics of reliever-only and preventer-using participants

Reliever-only users (n=1038)Preventer users (n=1634)p value
Age group<0.0001
 16–19 years90 (8.6%)116 (7.1%)
 20–29 years265 (25.6%)225 (13.8%)
 30–39 years264 (25.4%)256 (15.7%)
 40–49 years151 (14.5%)224 (13.7%)
 50–59 years153 (14.7%)284 (17.4%)
 60–69 years77 (7.4%)265 (16.2%)
 70 years and older39 (3.7%)263 (16.1%)
Male527 (50.7%)617 (37.8%)<0.0001
Highest education0.0017
 Year 10 or below158 (15.3%)294 (18.0%)
 Years 11–12190 (18.3%)327 (20.0%)
 Certificate or diploma339 (32.7%)565 (34.6%)
 University degree351 (33.8%)447 (27.4%)
Household income<0.0001
 <$52 000319 (30.7%)685 (41.9%)
 $52 000 and over547 (52.7%)638 (39.0%)
 Prefer not to say172 (16.6%)312 (19.1%)
Government concession card478 (46.1%)988 (60.4%)<0.0001
Smoking status<0.0001
 Current smoker257 (24.7%)287 (17.6%)
 Past smoker279 (26.9%)562 (34.4%)
 Never smoker502 (48.4%)786 (48.1%)
Overall health status0.0020
 Excellent218 (8.1%)68 (12.6%)
 Very good872 (32.5%)184 (34.2%)
 Good1050 (39.1%)174 (32.4%)
 Fair402 (15.0%)86 (16.1%)
 Poor145 (5.4%)25 (4.6%)
Frequency of reliever use<0.0001
 Every day93 (9.0%)328 (22.7%)
 5 or 6 days a week33 (3.1%)66 (4.5%)
 3 or 4 days a week121 (11.7%)149 (10.3%)
 1 or 2 days a week162 (15.6%)231 (16.0%)
 Less than 1 day a week185 (17.8%)233 (16.1%)
 Less than 1 day a month117 (11.3%)173 (12.0%)
 Only when I exercise68 (6.5%)48 (3.3%)
 A few times a year259 (24.9%)217 (15.0%)
ACT (last 4 weeks) (5–25), mean (SD)19.8 (4.6)18.7 (4.6)<0.0001
 Median (IQR)21 (17–23)19 (16–22)<0.0001
Well-controlled asthma symptoms in last 4 weeks (ACT≥20)639 (61.6%)816 (50.0%)<0.0001
Non-urgent GP visit for review of asthma373 (36.0%)976 (59.7%)<0.0001
  • ACT, Asthma Control Test; GP, general practitioner.