Patient-reported productivity loss during the past year by asthma severity grade
| Intermittent | Mild persistent | Moderate persistent | Severe persistent | |
| Subjects | 174 | 134 | 153 | 39 |
| Paid workdays lost | 4.1±13.0*; 0 | 4.8±12.1*; 0 | 7.5±20.6*; 0 | 17.7±37.6#; 0 |
| Unpaid work days lost | 3.1±12.7; 0 | 4.0±14.4; 0 | 4.8±15.4; 0 | 7.4±27.4; 0 |
| Effectiveness+ at paid work | 76.4±23.8*; 83.0 | 73.0±24.3*,#; 77.5 | 66.1±27.9#; 71.0 | 56.0±34.2¶; 57.0 |
| Satisfaction§ with treatment | 76.8±26.0*; 87.0 | 71.7±28.1*; 81.0 | 62.4±30.7#; 68.0 | 54.4±34.6#; 55.5 |
Data are presented as mean±sd
median unless otherwise indicated
+: visual analogue scale (VAS) of 0 (totally ineffective)–100 (normal effectiveness)
§: VAS of 0 (completely dissatisfied)–100 (completely satisfied)
*, #, ¶: p<0.05 versus differently labelled severity groups (analysis of variance with post hoc comparisons and Kruskal-Wallis test between severity groups)