BMC Pulmonary Medicine

Table 3 Univariate correlation coefficients for the 6MWD

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

Variable	Females (n = 176)		Males (n = 179)
	r-value	p-value	r-value	p-value
Age	−0.137	0.035	−0.196	0.004
Height	0.423	<0.001	0.464	<0.001
Weight	0.049	NS	−0.016	NS
BMI	−0.171	0.012	−0.254	<0.001
Resting HR	−0.049	NS	−0.063	NS
HR after the 6MWT	0.486	<0.001	0.351	<0.001
Difference in HR	0.524	<0.001	0.391	<0.001
Resting SpO₂	−0.077	NS	−0.012	NS
SpO₂ after the 6MWT	−0.052	NS	0.047	NS
Change in SpO₂	0.035	NS	0.093	NS
Resting DBP	−0.134	0.038	−0.165	0.014
Resting DBP	−0.111	0.071	−0.130	0.041
SBP after the 6MWT	0.271	<0.001	0.236	<0.001
DBP after the 6MWT	0.135	0.037	0.153	0.020

6MWT Six-minute walking test, 6MWD Six-minute walking distance, HR Heart beat, BMI Body mass index
SBP Systolic blood pressure, DBP Diastolic blood pressure, SpO ₂ Oxygen saturation
r-value: Pearson’s correlation coefficient

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