Of the 71 patients selected, 61 completed the study: 30
in the swimming group (18 female, 12 male) and 31 controls
(16 female, 15 male). Ten patients did not complete the
study: four lived in other cities and had difficulty making the
trip, one had worsening rhinitis, two completed pulmonary
function tests but did not return for swimming classes, and
three attended less than 80% of program sessions.