Table 2.
Asthma characteristics of the SABINA III PCP cohort according to investigator-classified asthma severity.
| Asthma characteristics | Primary care (n = 1440) | ||
|---|---|---|---|
| Investigator-classified mild asthmaa (n = 743) | Investigator-classified moderate-to-severe asthmaa (n = 695) | All (n = 1440) | |
| Asthma duration, years | |||
| Mean (SD) | 17.9 (14.78) | 16.5 (13.91) | 17.2 (14.37) |
| Median (min–max) | 13.0 (1.0–73.0) | 13.0 (1.0–70.0) | 13.0 (1.0–73.0) |
| Number of severe asthma exacerbations 12 months before the study visit | |||
| Mean (SD) | 1.1 (2.99) | 0.9 (1.60) | 1.0 (2.42) |
| Number of severe asthma exacerbations 12 months before the study visit | |||
| 0 | 453 (61.0) | 428 (61.6) | 882 (61.3) |
| 1 | 129 (17.4) | 130 (18.7) | 259 (18.0) |
| 2 | 59 (7.9) | 62 (8.9) | 122 (8.5) |
| 3 | 47 (6.3) | 32 (4.6) | 79 (5.5) |
| >3 | 55 (7.4) | 43 (6.2) | 98 (6.8) |
| Total | 743 (100.0) | 695 (100.0) | 1440 (100.0) |
| GINA classification | |||
| Step 1 | 316 (42.5) | 0 (0.0) | 316 (21.9) |
| Step 2 | 427 (57.5) | 0 (0.0) | 427 (29.7) |
| Step 3 | 0 (0.0) | 371 (53.4) | 371 (25.8) |
| Step 4 | 0 (0.0) | 261 (37.6) | 261 (18.1) |
| Step 5 | 0 (0.0) | 63 (9.1) | 63 (4.4) |
| Missing data | 0 (0.0) | 0 (0.0) | 2 (0.1) |
| Total | 743 (100.0) | 695 (100.0) | 1440 (100.0) |
| Level of asthma control | |||
| Well controlled | 318 (42.8) | 282 (40.6) | 601 (41.7) |
| Partly controlled | 244 (32.8) | 258 (37.1) | 503 (34.9) |
| Uncontrolled | 181 (24.4) | 155 (22.3) | 336 (23.3) |
| Total | 743 (100.0) | 695 (100.0) | 1440 (100.0) |
| Number of comorbidities | |||
| 0 | 328 (44.1) | 264 (38) | 593 (41.2) |
| 1–2 | 319 (42.9) | 276 (39.7) | 596 (41.4) |
| 3–4 | 89 (12) | 126 (18.1) | 215 (14.9) |
| ≥5 | 7 (0.9) | 29 (4.2) | 36 (2.5) |
Data are presented as n (%) unless otherwise specified. aInvestigator-classified asthma severity was guided by GINA 2017 treatment steps. Investigators were guided by GINA 2017 treatment steps, either in the study protocol or via a pop-up window in the eCRF.
eCRF electronic case report form, GINA Global Initiative for Asthma, max maximum, min minimum, PCP primary care physician, SABINA SABA use IN Asthma, SD standard deviation.