| | | BSFC | BSYQ | Placebo | value |
| | Mean age, years (SD) | 47.43 (12.68) | 46.69 (12.87) | 46.64 (13.18) | 0.88 | | Sex, n (%) | | | | 0.002 | | Male | 27 (26.47) | 40 (37.04) | 53 (50.96) | | | Female | 75 (73.53) | 68 (62.96) | 51 (49.04) | | | High, cm, mean (SD) | 161.32 (7.89) | 162.82 (8.11) | 163.58 (7.29) | 0.1 | | Weight, kg, mean (SD) | 62.27 (10.31) | 62.63 (10.19) | 62.85 (11.04) | 0.95 | | The number of asthmatic attacks in the last two years | | | | | | First year, mean (SD) | 1.72 (0.87) | 1.61 (0.76) | 1.77 (0.87) | 0.33 | | Second year, mean (SD) | 1.68 (0.88) | 1.50 (0.56) | 1.52 (0.79) | 0.07 | | FEV1/FVC, predicted | | | | | | FEV1 (%), mean (SD) | 80.72 (18.72) | 8.53 (20.31) | 79.11 (18.26) | 0.73 | | Mean (SD) | 76.77 (13.39) | 75.48 (16.56) | 75.17 (14.33) | 0.6 | | History of asthma | | | | 0.42 | | Yes, (%) | 22 (21.57) | 28 (25.93) | 30 (28.85) | | | No, (%) | 80 (78.43) | 80 (74.07) | 74 (71.15) | | | Family history of allergic diseases | | | | 0.52 | | Yes, (%) | 71 (69.61) | 72 (66.67) | 65 (62.50) | | | No, (%) | 31 (30.39) | 36 (33.33) | 39 (37.50) | | | Family history of eczema | | | | 0.38 | | Yes, (%) | 0 (0.00) | 1 (0.93) | 0 (0.00) | | | No, (%) | 102 (100.0) | 107 (99.07) | 104 (100.0) | | | Family history of allergic rhinitis | | | | 0.9 | | Yes, (%) | 8 (7.84) | 9 (8.33) | 7 (6.73) | | | No, (%) | 94 (92.16) | 99 (91.67) | 97 (93.27) | | | Life events | | | | 0.36 | | Yes, (%) | 0 (0.00) | 1 (0.98) | 0 (0.00) | | | No, (%) | 96 (100) | 101 (99.02) | 90 (100) | | | Chest X-ray | | | | 0.56 | | Normal, (%) | 74 (79.57) | 84 (81.55) | 71 (74.74) | | | Abnormal, (%) | 19 (20.43) | 19 (18.45) | 24 (25.26) | |
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