Table 1

Description of study population

Total (n=1106)Provided FEV1 (n=913)
Male sex (%)575 (52)473 (52)
Mean age, months (range)74 (63– 83)74 (64 –83)
Mean FEV1, L, (SD)1.13 (0.31)
Mean bronchodilation after salbutamol, % (SD)13.4 (20.1)
n=903
Wheeze in the past 12 months (%)422 (38)356 (39)
Received inhaled steroids in the 12 months before (%)
 Year 189 (8)68 (7)
 Year 2176 (17) n=1051153 (18) n=869
 Year 3203 (18)163 (18)
 Year 4
 Year 5182 (16)150 (16)
Received salbutamol inhaler in the previous 12 months (%)
 Year 5416 (38)345 (38)
Received intravenous or oral steroids in the 12 months before (%)
 Year 1295 (27)244 (27)
 Year 2418 (40) n=1051345 (40) n=869
 Year 3407 (37)333 (36)
 Year 4
 Year 5283 (26)240 (26)
  • FEV1, forced expiratory volume in 1 s.