Table 1

 Distribution of background variables and indoor exposures by sex and age

Women(n = 1246)Men(n = 1155)Age groups
26–40(n = 1711)41–60(n = 1832)61–82(n = 1448)
Data are shown as n (%).
*p<0.05 (significant difference between sexes or age groups).
Educational level
    Primary247 (20.1)197 (17.3)93 (12.3)124 (12.5)227 (36.7)*
    Secondary713 (58.2)660 (57.2)435 (57.4)608 (61.4)330 (53.3)
    University266 (21.7)284 (24.9)230 (30.3)258 (26.1)62 (10.0)
Smoking status
    Current389 (31.2)402 (34.8)*326 (42.9)415 (41.8)188 (29.7)*
    Ex286 (23.0)380 (32.9)78 (10.3)233 (23.5)171 (27.1)
    Never571 (45.8)373 (32.3)356 (46.8)345 (34.7)273 (43.2)
Occupational exposure
    Yes381 (30.6)714(61.8)238 (31.2)305 (30.6)157 (24.5)*
Mould exposure
    Only earlier65 (5.2)51 (4.4)*39 (5.1)54 (5.4)23 (3.6)*
    Earlier and last year54 (4.3)53 (4.6)55 (7.2)42 (4.2)10 (1.6)
Water damage
    Only earlier94 (7.5)101 (8.7)71 (9.3)86 (8.6)38 (5.9)*
    Earlier and last year42 (3.4)52 (4.5)49 (6.4)34 (3.4)11 (1.7)
Fitted carpets
    Bedroom464 (37.2)436 (37.7)236 (30.9)419 (42.0)245 (38.2)*
    Living room189 (15.2)184 (15.9)107 (14.0)143 (14.3)123 (19.2)*
Cat
    In adulthood222 (17.8)234 (20.3)162 (21.2)238 (23.9)56 (8.7)*
    In childhood688 (55.2)582 (50.4)405 (53.1)512 (51.4)353 (55.1)
Dog
    In adulthood170 (13.6)168 (14.5)*112 (14.7)183 (18.4)43 (6.7)*
    In childhood461 (37.0)437 (37.8)316 (41.4)345 (34.6)237 (37.0)*