Table 3. Partial regression coefficient (β) and 95% confidence intervals (95%CI) of area variation at different lung sections by selected variables.
| U | M | L | |||||
| β | 95%CI | β | 95%CI | β | 95%CI | ||
| Areas | Gender§ | 26.0 | (30.8,21.2) | 45.0 | (50.5,39.6) | 105.3 | (111.7,98.8) |
| Age | 0.4 | (0.0,0.7) | 0.3 | (−0.1,0.7) | 0.5 | (0.0,0.9) | |
| BMI | −0.4 | (−0.7,0.0) | 0.2 | (−0.2,0.7) | 2.8 | (2.3,3.3) | |
| Emphysema%* | 3.9 | (1.8,6.0) | 5.4 | (3.0,7.8) | 2.4 | (−0.4,5.3) | |
| FEV1%** | −1.5 | (−3.2,0.3) | −0.2 | (−2.2,1.8) | −0.4 | (−2.7,2.0) | |
| FVC%** | 1.3 | (−0.6,3.2) | 2.8 | (0.7,4.9) | 5.1 | (2.5,7.6) | |
| R2 | 20.6% | 31.7% | 64.0% | ||||
| D1 | Gender§ | 3.90 | (4.71,3.09) | 4.90 | (5.68,4.12) | 7.21 | (8.06,6.35) |
| Age | −0.08 | (−0.14,−0.02) | −0.07 | (−0.13,−0.01) | −0.01 | (−0.08,0.05) | |
| BMI | −0.06 | (−0.12,0.01) | 0.00 | (−0.06,0.06) | 0.00 | (−0.07,0.07) | |
| Emphysema%* | 0.24 | (−0.12,0.59) | 0.13 | (−0.21,0.47) | 0.13 | (−0.25,0.50) | |
| FEV1%** | −0.01 | (−0.31,0.29) | 0.04 | (−0.25,0.32) | 0.13 | (−0.18,0.45) | |
| FVC%** | 0.13 | (−0.18,0.45) | 0.15 | (−0.15,0.45) | 0.27 | (−0.06,0.61) | |
| R2 | 12.0% | 18.5% | 28.3% | ||||
| D2 | Gender§ | 8.12 | (9.34,6.89) | 3.98 | (5.32,2.63) | 8.87 | (10.53,7.22) |
| Age | −0.07 | (−0.16,0.03) | −0.11 | (−0.21,−0.01) | −0.04 | (−0.17,0.08) | |
| BMI | 0.17 | (0.07,0.27) | 0.17 | (0.06,0.28) | 0.12 | (−0.02,0.25) | |
| Emphysema%* | −0.37 | (−0.91,0.17) | −0.58 | (−1.17,0.01) | −0.69 | (−1.42,0.04) | |
| FEV1%** | 0.09 | (−0.35,0.54) | 0.13 | (−0.37,0.62) | 0.61 | (0.00,1.21) | |
| FVC%** | 0.15 | (−0.33,0.63) | 0.09 | (−0.44,0.61) | 0.41 | (−0.24,1.06) | |
| R2 | 22.0% | 8.3% | 16.7% | ||||
| D3 | Gender§ | 3.68 | (5.08,2.28) | 5.05 | (6.64,3.46) | 11.83 | (13.63,10.04) |
| Age | 0.04 | (−0.07,0.14) | −0.01 | (−0.13,0.11) | 0.05 | (−0.08,0.19) | |
| BMI | −0.10 | (−0.21,0.02) | −0.02 | (−0.15,0.11) | 0.36 | (0.22,0.51) | |
| Emphysema%* | 0.75 | (0.14,1.37) | 1.08 | (0.38,1.78) | 0.61 | (−0.18,1.40) | |
| FEV1%** | −0.12 | (−0.63,0.39) | 0.16 | (−0.43,0.74) | 0.30 | (−0.36,0.96) | |
| FVC%** | 0.05 | (−0.49,0.60) | 0.12 | (−0.50,0.74) | 0.35 | (−0.35,1.05) | |
| R2 | 6.6% | 7.4% | 23.9% | ||||
| D4 | Gender§ | 6.30 | (7.74,4.86) | 7.77 | (8.94,6.60) | 14.50 | (15.70,13.30) |
| Age | −0.10 | (−0.20,0.01) | −0.12 | (−0.21,−0.03) | −0.05 | (−0.14,0.03) | |
| BMI | −0.15 | (−0.26,−0.03) | −0.03 | (−0.13,0.06) | 0.29 | (0.20,0.39) | |
| Emphysema%* | 1.02 | (0.39,1.65) | 1.01 | (0.49,1.52) | 0.19 | (−0.34,0.71) | |
| FEV1%** | −0.07 | (−0.59,0.46) | 0.23 | (−0.20,0.66) | 0.34 | (−0.11,0.78) | |
| FVC%** | 0.33 | (−0.23,0.89) | 0.39 | (−0.07,0.85) | 0.77 | (0.30,1.24) | |
| R2 | 12.0% | 22.3% | 47.7% | ||||
| D5 | Gender§ | 7.55 | (9.51,5.58) | 12.27 | (14.23,−10.31) | 26.08 | (28.26,23.89) |
| Age | 0.28 | (0.13,0.43) | 0.30 | (0.16,0.45) | 0.29 | (0.13,0.45) | |
| BMI | −0.11 | (−0.27,0.05) | 0.10 | (−0.06,0.25) | 0.75 | (0.57,0.93) | |
| Emphysema%* | 1.44 | (0.58,2.29) | 1.55 | (0.69,2.40) | 0.87 | (−0.08,1.83) | |
| FEV1%** | −0.76 | (−1.48,−0.04) | −0.23 | (−0.94,0.49) | −0.55 | (−1.35,0.25) | |
| FVC%** | 0.52 | (−0.25,1.28) | 0.93 | (0.17,1.70) | 1.29 | (0.44,2.14) | |
| R2 | 17.5% | 24.5% | 51.2% | ||||
Notes: numbers in bold characters are statistically significant;
§
male as compared with female;
*
5 percentage points variation;
**
10 percentage points variation.