. 2021 Aug 18;9:691669. doi: 10.3389/fpubh.2021.691669

Table 4.

Multiple stepwise regression analysis statistics of health and physical fitness of adolescents of different ages on their overall health-promoting lifestyle.

Male model →	≤14 years old			14 < age≤17			>17 years old
	Equation 1(β)	Equation 2(β)	Equation 3(β)	Equation 1(β)	Equation 2(β)	Equation 3(β)	Equation 1(β)	Equation 2(β)	Equation 3(β)
Body mass index BMI
Flexibility						0.127^**
Muscle strength			0.196^*		0.189^**	0.186^**
Muscular endurance	0.217^**	0.217^**	0.216^**						0.189^**
Explosive power		0.262^**	0.262^**					0.216^**	0.216^**
Cardiopulmonary endurance				0.241^**	0.241^**	0.237^**	0.302^**	0.302^**	0.302^**
Complex correlation coefficient R	0.21^**	0.28^**	0.31^**	0.23^**	0.29^**	0.33^**	0.29^**	0.37^**	0.45^**
Determination coefficient R²	0.044	0.078	0.096	0.053	0.084	0.109	0.084	0.137	0.203
Interpretation increment ▲R²	0.044	0.034	0.018	0.053	0.031	0.025	0.084	0.053	0.066
Statistics, F	10.26^**	9.24^**	11.02^**	13.05^**	9.37^**	11.36^**	10.85^**	12.78^**	17.023^**
Female model →	≤14 years old			14 < age ≤ 17			>17 years old
Body mass index BMI								−0.206^**	-0.206^**
Flexibility		0.181^**	0.181^**			0.192^**
Muscle strength	0.205^**	0.201^**	0.201^**
Muscular endurance	0.229^**	0.224^**	0.224^**		0.246^**	0.246^**			0.178^**
Explosive power
Cardiopulmonary endurance			0.158^**	0.307^**	0.307^**	0.307^**	0.254^**	0.254^**	0.254^**
Complex correlation coefficient R	0.29^**	0.34^**	0.38^**	0.28^**	0.35^**	0.42^**	0.28^**	0.35^**	0.41^**
Determination coefficient R²	0.084	0.116	0.144	0.078	0.123	0.176	0.078	0.123	0.168
Interpretation increment ▲R²	0.084	0.032	0.028	0.078	0.045	0.053	0.078	0.045	0.045
Statistics, F	13.28^**	11.21^**	9.27^**	9.06^**	13.29^**	8.58^**	14.27^**	12.77^**	10.66^**

P < 0.05;

^**

P < 0.01.