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MEAN FEV1% PREDICTED IN 1992 COMPARED WITH 1998
| Mean FEV1% Predicted (SD)
|
|||
|---|---|---|---|
| Group | 1992 | 1999 | Mean Absolute Change (% predicted) |
| Trial participants, n = 2,366 (90%) | 68% (26) | 62% (26) | 7.6% (21)* |
| Trial nonparticipants, n = 5,196 (85%) | 77% (25) | 69% (26) | 9.0% (21)* |
Comparison of participants with nonparticipants, p = 0.01.
