TABLE 1

Characteristics of the study population# by sex

CharacteristicWomenMenStandardised difference
Subjects131 62877 426
Age group at asthma prevalence years
 47–5943245 (32.85)24712 (31.92)0.020
 60–6952023 (39.52)32297 (41.71)0.045
 70–9936360 (27.62)20417 (26.37)0.028
Age group at baseline+ years
 66–7568022 (51.68)41609 (53.74)0.041
 76–8546769 (35.53)28 384 (36.66)0.024
 86–9916 837 (12.79)7 433 (9.60)0.100
Asthma duration years11.88±5.4311.41±5.620.086
Follow-up time years5.20±1.605.04±1.730.097
Income quintile
 1 (lowest)28 790 (21.87)14 771 (19.08)0.069
 228 197 (21.42)16 074 (20.76)0.016
 325 904 (19.68)15 527 (20.05)0.009
 424 845 (18.88)15 550 (20.08)0.031
 5 (highest)23 385 (17.77)15 227 (19.67)0.049
 Missing507 (0.39)277 (0.36)0.005
Rural
 Yes15 065 (11.45)9951 (12.85)0.043
 No116 531 (88.53)67 455 (87.12)0.043
 Missing32 (0.02)20 (0.03)0.001
Ontario Marginalization Index
 Deprivation quintile
  1 (lowest)24 023 (18.25)15 166 (19.59)0.034
  224 304 (18.46)15 019 (19.40)0.024
  325 673 (19.50)15 392 (19.88)0.009
  426 892 (20.43)15 418 (19.91)0.013
  5 (highest)28 941 (21.99)15 523 (20.05)0.048
  Missing1795 (1.36)908 (1.17)0.017
 Dependency quintile
  1 (lowest)16 502 (12.54)10 472 (13.53)0.029
  220 221 (15.36)13 107 (16.93)0.043
  322 224 (16.88)13 891 (17.94)0.028
  425 518 (19.39)15 609 (20.16)0.019
  5 (highest)45 368 (34.47)23 439 (30.27)0.090
  Missing1795 (1.36)908 (1.17)0.017
 Ethnic concentration quintile
  1 (lowest)26 616 (20.22)15 876 (20.5)0.007
  223 409 (17.78)13 928 (17.99)0.005
  323 987 (18.22)13 710 (17.71)0.013
  425 292 (19.21)14 510 (18.74)0.012
  5 (highest)30 529 (23.19)18 494 (23.89)0.016
  Missing1795 (1.36)908 (1.17)0.017
 Residential instability quintile
  1 (lowest)17 104 (12.99)12 339 (15.94)0.084
  220 979 (15.94)14 481 (18.70)0.073
  324 155 (18.35)15 385 (19.87)0.039
  427 165 (20.64)15 550 (20.08)0.014
  5 (highest)40 430 (30.72)18 763 (24.23)0.150
  Missing1795 (1.36)908 (1.17)0.017
Prevalence of other health conditions
 COPD75 507 (57.36)50 895 (65.73)0.170
 Diabetes49 022 (37.24)32 845 (42.42)0.110
 Hypertension112 497 (85.47)64 136 (82.84)0.072
 Stroke39 887 (30.3)24 054 (31.07)0.017
 Congestive heart failure34 517 (26.22)22 578 (29.16)0.066
 Acute myocardial infarction9529 (7.24)9899 (12.79)0.190
 Lung cancer4272 (3.25)3315 (4.28)0.055
 Breast cancer10 435 (7.93)157 (0.2)0.400
 Other cancer17 814 (13.53)21 560 (27.85)0.360
Number of CADGs5.62±2.075.74±2.070.056
Died during follow-up
 Yes27 487 (20.88)19 254 (24.87)0.095
 No104 141 (79.12)58 172 (75.13)0.095
Cause of death
 Diseases of the circulatory system7778 (28.3)5406 (28.08)0.005
 Neoplasms5938 (21.6)4849 (25.18)0.085
 Diseases of the respiratory system5125 (18.65)3882 (20.16)0.038
 Mental and behavioural disorders1888 (6.87)881 (4.58)0.099
 Diseases of the nervous system996 (3.62)578 (3.00)0.035
 Other5490 (19.97)3455 (17.94)0.052
 Missing272 (0.99)203 (1.05)0.006

Data are presented as n, n (%) or mean±sd, unless otherwise stated. CADGs: Collapsed Aggregated Diagnosis Groups. #: n=209 054; : standardised difference of >0.1 generally considered different (shown in bold); +: 1 April 2010.