Table 5.

Measured 6MWD and predicted 6MWD for the same age range based on the equations reported in previous studies

Study	Measured (m)	Predicted (m)	Measured − predicted (m)
Iwama et al. [18]	627.3 ± 52.88	609.4 ± 31.53	17.9 ± 49.58*
Alameri et al. [19]	627.3 ± 52.88	458.3 ± 22.86	168.9 ± 45.29*
Chetta et al. [20]	627.5 ± 52.65	637.4 ± 16.41	−9.9 ± 54.64*
Gibbons et al. [21]	627.5 ± 52.65	756.7 ± 38.70	−129.1 ± 73.86*
Osses et al. [22]	627.5 ± 52.65	737.4 ± 34.88	−107.1 ± 46.89*
Kim et al. [23]	625.1 ± 53.60	620.1 ± 15.8	4.9 ± 55.40

6MWD Six-minute walking distance

*p < 0.05 according to Student's t-test