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. 2022 Apr 5;23:83. doi: 10.1186/s12931-022-02003-y

Table 4.

Regression coefficients, 95%CI and p-value of the Linear Regression Model for the outcome 6MWD – Males

β 95%CI p
Age (years) − 1.72 (− 2.60; − 0.85)  < 0.001
Height (cm) 2.34 (0.64; 4.04) 0.007
Weight (kg) − 0.45 (− 1.67; 0.77) 0.466
Active vs not active − 2.54 (− 21.75; 16.66) 0.794
Age2 (years2) − 0.06 (− 0.11; 0.00) 0.042
Age*Height (years*cm) − 0.13 (− 0.23; − 0.03) 0.012
Constant term 615.18 (598.30; 632.07)  < 0.001

(R squared = 0.1592). The regression model was estimated using centered variables