Table 2:

Reference Equation

Prediction Model	Reference equation	Spearman Correlation	Adjusted R2
Enright Model	6MWD(m) [female] = (2.11 × height(cm)) – (2.29 × weight(kg)) - (5.78 × age) + 667 6MWD (m) [male] = (7.57 × height(cm)) – (5.02 × age) – (1.76 × weight(kg)) – 309	0.335	n/a
Chetta Model	6MWD(m) [female]= (1.25 × height(cm)) – (2.816 × age) + 479.783 6MWD(m) [male]= (1.25 × height(cm)) – (2.816 × age) + 518.853	0.233	0.05
Gibbons Model	6MWD(m) [female] = 794.1 – (age × 2.99) 6MWD(m) [male] = 868.8 – (age × 2.99)	0.213	0.042
Model 1	6MWD(m) [female] = (2.64 × height(cm)) – (2.12 × weight(kg)) + (0.12 × age) + 330.2 6MWD(m) [male] = (6.22 × height(cm)) – (2.99 × weight(kg)) – (0.52 × age) – 183.06	0.457	0.196

6MWD = six-minute walk distance