Mean (SD) SF-12 physical component summary (PCS) score and mental component summary (MCS) score and frequency of feelings of lack of control in those with and without asthma
| Mental health variable (asthma:no asthma) | PCS‡ | MCS‡ | ||
|---|---|---|---|---|
| Asthma | No asthma | Asthma | No asthma | |
| *p<0.01; †p<0.05. | ||||
| ‡Higher scores indicate better quality of life. | ||||
| Lack of control—in general | ||||
| Always (16:101) | 31.9 (12.0)* | 46.8 (12.1) | 41.5 (15.2) | 40.0 (14.4) |
| Often (53:234) | 42.4 (13.7)* | 47.5 (12.7) | 41.7 (12.0) | 40.0 (12.2) |
| Sometimes (166:1036) | 45.6 (12.3)† | 49.1 (10.8) | 45.9 (10.0) | 46.1 (10.3) |
| Rarely (161:1264) | 47.5 (10.6) | 50.2 (8.9) | 50.8 (9.0) | 51.4 (7.7) |
| Never (457:3958) | 46.3 (10.9)† | 50.0 (9.0) | 54.1 (7.9) | 55.2 (6.3) |
| Lack of control—health | ||||
| Always (38:168) | 29.6 (11.5)* | 37.5 (13.6) | 40.4 (14.1) | 41.1 (13.2) |
| Often (62:259) | 36.1 (11.2)† | 39.0 (11.6) | 44.0 (11.5) | 44.9 (11.5) |
| Sometimes (196:1152) | 42.1 (12.2)† | 45.5 (11.0) | 49.3 (10.8) | 49.3 (10.2) |
| Rarely (131:1070) | 47.3 (9.9) | 49.8 (8.6) | 51.7 (8.7) | 51.3 (8.5) |
| Never (426:3944) | 50.0 (8.9) | 52.2 (7.3) | 53.3 (7.8) | 54.4 (7.1) |
| Lack of control—finances | ||||
| Always (53:386) | 44.7 (11.2)† | 48.0 (10.6) | 43.5 (9.9) | 43.5 (12.8) |
| Often (90:499) | 49.7 (10.7) | 49.7 (9.7) | 45.7 (10.9) | 46.9 (10.5) |
| Sometimes (186:1617) | 46.8 (10.3)† | 50.7 (8.9) | 51.5 (8.8) | 51.1 (8.3) |
| Rarely (149:1147) | 47.8 (10.1) | 51.3 (8.8) | 53.5 (7.7) | 51.3 (8.5) |
| Never (389:3825) | 47.7 (11.6) | 49.6 (9.5) | 51.8 (9.4) | 54.2 (7.7) |
| Lack of control—personal life | ||||
| Always (23:77) | 44.8 (14.7)† | 48.1 (11.4) | 41.9 (15.7) | 38.2 (14.6) |
| Often (31:184) | 48.2 (14.2) | 46.1 (12.5) | 35.5 (10.4) | 37.3 (11.7) |
| Sometimes (169:1051) | 47.5 (11.1) | 50.2 (9.6) | 45.6 (10.5) | 47.5 (9.8) |
| Rarely (179:1243) | 44.8 (9.4)* | 50.8 (8.6) | 50.3 (9.1) | 50.9 (7.9) |
| Never (465:4025) | 47.2 (11.1) | 49.9 (9.3) | 55.5 (6.2) | 54.7 (6.8) |