Low leptin levels are associated with elevated physical activity among lean school children in rural Tanzania

BMC Public Health

Table 3 Results of linear model of predictors of physical activity parameters among Tanzanian school children (N = 223)*

Outcome		B	95% CI	SE B	β	p
MVPA	Model 1a^a
	Constant	152.24	140.52, 163.96	5.95		< .001
	Leptin	-30.26	-40.38, -20.14	5.14	-.37	< .001
	Model 1b^b
	Constant	312.26	214.41, 410.11	49.65		< .001
	Leptin	-18.06	-29.66, -6.47	5.88	-.22	.002
	Male sex	23.77	13.35, 34.19	5.29	.30	< .001
	BMI z-score	5.62	-0.37, 11.62	3.04	.12	.066
	Walking time to get to school	0.64	0.36, 0.93	0.14	.25	< .001
	Ambient temperature	-8.37	-12.77, -3.94	2.25	-.22	< .001
		B	95% CI	SE B	β	p
Total counts	Model 2a^c
	Constant	1,297,387.1	1,234,793.8, 1,359,980.4	31,761.1		< .001
	Leptin	-129,893.9	-183,973.0, -75,814.7	27,440.8	-.30	< .001
	Model 2b^d
	Constant	247,033.8	1,957,655.7, 3,036,412.0	273,663.2		< .001
	Leptin	-90,255.7	-154,146.1, -26,365.3	32,415.9	-.21	.006
	Male sex	67,404.9	9969.2, 124,840.6	29,141.0	.16	.022
	BMI z-score	32,110.3	-932.9, 65,153.4	16,765.1	.13	.057
	Walking time to get to school	2610.2	1045.3, 4175.1	794.0	.20	.001
	Ambient temperature	-56,462.3	-80,858.4, -32,066.2	12,377.8	-.28	< .001

B: unstandardized regression coefficient, β: standardized regression coefficient;
*Model 1a and 2a unadjusted; Model 1b and 2b hierarchical inclusion of other predictors showing significance after inclusion in Model 1/1a;
^aR²=.14; ^bR²=.32, adjusted R²=.31 ΔR²=.19, ^cR²=.09, ^dR²=.24, ΔR²=.15, adjusted R² =.23 (all p<.001), BMI body mass index.

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