Cross sectional study (the Aerobics Center Longitudinal Study, 1971–1995)
| Variable | MTT (min) | FEV1 (litres) | FVC (litres) | FEV1/FVC (%) |
|---|---|---|---|---|
| Least squared means and 95% confidence interval from multivariate generalised regression analyses, controlling for other variables in the table. Levels of physical activity were high (>20 miles a week), moderate (10–20 miles a week), low (<20 miles a week), other than running, and none (sedentary). For the difference, the lower level was taken as a reference. | ||||
| MTT, maximal treadmill test; FEV1, forced expiratory volume in the first second; FVC, forced vital capacity; BMI, body mass index. | ||||
| Men | ||||
| Physical activity | ||||
| High | 23.31 (23.08 to 23.54) | 4.02 (3.98 to 4.06) | 5.14 (5.10 to 5.19) | 78.30 (77.81 to 78.79) |
| Moderate | 21.00 (20.83 to 21.16) | 3.93 (3.90 to 3.96) | 5.07 (5.04 to 5.10) | 77.71 (77.34 to 78.08) |
| Low | 18.32 (18.20 to 18.45) | 3.89 (3.87 to 3.91) | 4.98 (4.96 to 5.01) | 78.17 (77.90 to 78.44) |
| Other | 18.84 (18.37 to 19.31) | 3.94 (3.86 to 4.02) | 5.06 (4.98 to 5.15) | 78.98 (77.95 to 79.01) |
| Sedentary | 15.69 (15.62 to 15.77) | 3.79 (3.78 to 3.81) | 4.87 (4.86 to 4.89) | 77.97 (77.80 to 78.13) |
| Current smoking | ||||
| Yes | 18.49 (18.34 to 18.65) | 3.83 (3.80 to 3.85) | 4.94 (4.91 to 4.97) | 77.57 (77.23 to 77.92) |
| No | 20.37 (20.25 to 20.54) | 4.00 (3.98 to 4.02) | 5.11 (5.09 to 5.13) | 78.47 (78.22 to 78.73) |
| Current drinking | ||||
| Yes | 19.58 (19.47 to 19.71) | 3.92 (3.90 to 3.94) | 5.04 (5.01 to 5.06) | 78.00 (77.73 to 78.25) |
| No | 19.28 (19.12 to 19.43) | 3.91 (3.88 to 3.93) | 5.01 (4.99 to 5.04) | 78.06 (77.72 to 78.39) |
| Difference | ||||
| 5 years older | −0.74 (−0.78 to −0.71) | −0.26(−0.27 to−0.25) | −0.27(−0.28 to−0.26) | −0.53 (−0.60 to −0.46) |
| 5 unit BMI higher | −2.52 (−2.59 to −2.47) | − | − | − |
| 5 cm taller | − | 0.41(0.40 to 0.42) | 0.61(0.60 to 0.63) | −0.71 (−0.79 to −0.62) |
| Women | ||||
| Physical activity | ||||
| High | 18.69 (18.20 to 19.20) | 2.86 (2.80 to 2.92) | 3.61 (3.54 to 3.67) | 79.36 (79.20 to 80.52) |
| Moderate | 15.86 (15.54 to 16.19) | 2.82 (2.78 to 2.86) | 3.58 (3.54 to 3.62) | 78.78 (78.01 to 79.55) |
| Low | 13.44 (13.21 to 13.67) | 2.78 (2.75 to 2.81) | 3.51 (3.48 to 3.54) | 79.22 (78.77 to 79.76) |
| Other | 13.95 (13.27 to 14.63) | 2.81 (2.73 to 2.90) | 3.57 (3.48 to 3.66) | 78.86 (77.27 to 80.44) |
| Sedentary | 10.95 (10.80 to 11.10) | 2.71 (2.68 to 2.73) | 3.43 (3.41 to 3.45) | 79.08 (78.73 to 79.42) |
| Current smoking | ||||
| Yes | 13.86 (13.55 to 14.16) | 2.73 (2.69 to 2.76) | 3.50 (3.45 to 3.53) | 78.07 (77.36 to 78.79) |
| No | 15.30 (15.12 to 15.49) | 2.87 (2.84 to 2.89) | 3.59 (3.56 to 3.61) | 80.05 (79.61 to 80.48) |
| Current drinking | ||||
| Yes | 14.97 (14.75 to 15.12) | 2.81 (2.79 to 2.84) | 3.56 (3.53 to 3.59) | 78.99 (78.62 to 79.64) |
| No | 14.19 (13.94 to 14.44) | 2.78 (2.75 to 2.81) | 3.52 (3.49 to 3.55) | 79.13 (78.40 to 79.57) |
| Difference | ||||
| 5 years older | −0.76 (−0.82 to −0.70) | −0.22(−0.23 to −0.20) | −0.19(−0.21 to −0.17) | −0.96 (−1.10 to −0.82) |
| 5 unit BMI higher | −1.72 (−1.84 to −1.61) | − | − | − |
| 5 cm taller | − | 0.30(0.28 to 0.32) | 0.44(0.42 to 0.46) | −0.64 (−0.82 to −0.46) |