Table 1—

Patient characteristics

Group 1 (never isolated)Group 2 (intermittent isolation)Group 3 (chronic isolation)
Subjects n678214
Age at first pulmonary function test yrs43.6±14.645.1±12.249.4±14.91
Sex M:F21:4625:576:8
Smoking habit yes:no:ex2:54:110:66:160:11:3
Time between pulmonary function tests yrs9.9±4.911.0±5.58.8±5.3
  • Data are presented as n or mean±sd, unless otherwise stated. M: male; F: female; Ex: ex-smoker.