Number of days in hospital over the 12-month follow-up period
| t-PA | DNase | Placebo | t-PA–DNase | |
| Subjects | 44 | 41 | 48 | 45 |
| Initial hospital stay | ||||
| Number of days, nonsurgical | 14.48±20.21 | 22.59±58.74 | 23.65±54.90 | 11.43±9.31 |
| Number of days, surgical | 2.05±9.30 | 5.66±18.07 | 1.17±4.36 | 0.24±1.15 |
| Number of days, total | 16.52±22.79 | 28.24±61.41 | 24.81±56.11 | 11.78±9.43 |
| Subsequent hospital stays | ||||
| Patients with one or more subsequent admissions | 3 (7) | 1 (2) | 4 (8) | 1 (2) |
| Number of days | 0.75±2.96 | 0.75±4.83 | 1.38±6.54 | 0.16±1.04 |
| Total hospital stays | ||||
| Number of days | 17.27±24.79 | 29.00±62.01 | 26.19±56.66 | 11.93±9.57 |
Data are presented as n, mean±sd or n (%). t-PA: tissue plasminogen activator.