Table 3 The linear regression models of anthropometric data, body fat percentage and fat mass index with 24-h sleep duration as a continuous variable in both gender.

From: Sleep duration and anthropometric indices in an Iranian population: the Fasa PERSIAN cohort study

Model	Dependent variable	Independent variable:	Male				Female
		Independent variable:	Unstandardized coefficients		Standardized coefficients	p-value	Unstandardized coefficients		Standardized coefficients	p-value
		Sleep duration	B	Std. error	Beta	p-value	B	Std. error	Beta	p-value
Model 1	BMI (kg/m²)		− 0.205	0.04	− 0.077	< 0.001	− 0.102	0.041	− 0.034	0.012
Model 2			− 0.166	0.039	− 0.062	< 0.001	− 0.102	0.041	− 0.034	0.012
Model 3			− 0.157	0.038	− 0.059	< 0.001	− 0.182	0.041	− 0.060	< 0.001
Model 1	WC (cm)		− 0.406	0.100	− 0.060	< 0.001	− 0.369	0.097	− 0.051	< 0.001
Model 2			− 0.283	0.098	− 0.042	0.004	− 0.250	0.098	− 0.035	0.010
Model 3			− 0.263	0.097	− 0.039	0.007	− 0.446	0.099	− 0.062	< 0.001
Model 1	HC (cm)		− 0.316	0.069	− 0.068	< 0.001	− 0.136	0.080	− 0.023	0.088
Model 2			− 0.258	0.068	− 0.055	< 0.001	− 0.221	0.079	− 0.037	0.005
Model 3			− 0.239	0.067	− 0.051	< 0.001	− 0.368	0.080	− 0.062	< 0.001
Model 1	WrC (cm)		− 0.052	0.011	− 0.070	< 0.001	− 0.007	0.011	− 0.008	0.545
Model 2			− 0.042	0.011	− 0.057	< 0.001	− 0.008	0.011	− 0.010	0.444
Model 3			− 0.038	0.011	− 0.051	< 0.001	− 0.023	0.011	− 0.029	0.035
Model 1	WHR		− 0.001	0.001	− 0.028	0.054	− 0.002	0.001	− 0.061	< 0.001
Model 2			0.000	0.001	− 0.010	0.479	0.000	0.000	− 0.010	0.456
Model 3			0.000	0.001	− 0.009	0.512	− 0.001	0.001	− 0.024	0.065
Model 1	WHtR		− 0.002	0.001	− 0.058	< 0.001	− 0.003	0.001	− 0.062	< 0.001
Model 2			− 0.002	0.001	− 0.040	0.005	− 0.002	0.001	− 0.037	0.006
Model 3			− 0.002	0.001	− 0.039	0.006	− 0.003	0.001	− 0.064	< 0.001
Model 1	Body fat (%)		− 0.287	0.118	− 0.052	0.016	− 0.017	0.107	− 0.003	0.876
Model 2			− 0.308	0.119	− 0.056	0.009	− 0.145	0.108	− 0.027	0.181
Model 3			− 0.310	0.119	− 0.056	0.009	− 0.161	0.112	− 0.030	0.148
Model 1	FMI (kg/m²)		− 0.017	0.043	− 0.008	0.692	− 0.042	0.047	− 0.018	0.369
Model 2			− 0.005	0.042	− 0.003	0.903	0.01	0.047	0.004	0.833
Model 3			− 0.006	0.043	− 0.003	0.889	− 0.035	0.049	− 0.015	0.474

Standardized regression coefficients calculated as b_i × S_Xi/S_Y. BMI body mass index, WC waist circumferences, HC hip circumferences, WrC wrist circumferences, WHR waist to hip ratio, WHtR waist to height ratio, FMI fat mass index. Model 1: unadjusted, Model 2: Adjusted with age, CVD history, socio-economic index, Model 3: adjusted with age, CVD history, socio-economic index and physical activity (MET score), dietary intake (energy intake Kcal/day).
Bold values are less than 0.05 and are statistically significant.

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Table 3 The linear regression models of anthropometric data, body fat percentage and fat mass index with 24-h sleep duration as a continuous variable in both gender.

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