Reference Equations for the Six-Minute Walk Distance in the Healthy Chinese Han Population, Aged 18–30 Years

BMC Pulmonary Medicine

Table 1 Characteristics of the study subjects

Characteristic	Females (n = 176)	Males (n = 179)	p-value*	Total (n = 355)
Active	62	100		162
Age, years	23.8 ± 3.77	23.9 ± 3.76	NS	23.9 ± 3.76
Height, cm	160.4 ± 5.12	172.6 ± 5.4	<0.001	166.6 ± 8.03
Weight, kg	54.6 ± 8.78	65.0 ± 9.11	<0.001	59.9 ± 10.35
BMI, kg/m²	21.2 ± 3.19	21.9 ± 2.80	0.046	21.5 ± 3.01
FEV₁, L	3.4 ± 0.38	4.5 ± 0.49	<0.001	3.9 ± 0.43
FVC, L	3.5 ± 0.40	4.8 ± 0.56	<0.001	4.2 ± 0.48
FEV₁, % pred	97.1 ± 11.18	93.7 ± 10.76	0.024	95.4 ± 10.97

Values are expressed as mean ± SD
BMI Body mass index, FVC Forced vital capacity, FEV ₁ Forced expiratory volume in one second
*p-value between males and females

ISSN: 1471-2466