Table 7.

Multiple regression analysis models (stepwise method) with ΔPSQI score as a dependent variable to estimate the predictive value of changes in BMI, body composition parameters, and inflammatory biomarker after 31 days of active stage of VLCKD

Parameters	Multiple regression analysis
	R2	β	t	*p value
Δ% FM kg	0.201	− 0.452	− 8.19	< 0.001
Variables excluded: Δ% BMI, Δ% R, Δ% PhA, aΔ% hs-CRP levels

PSQI Pittsburgh Sleep Quality Index, BMI body mass index, VLCKD very low-calorie ketogenic diet, FM fat mass, R resistance, PhA phase angle, hs-CRP high-sensitivity C-reactive protein

*A p value in bold type denotes a significant difference (p < 0.05)

^ahs-CRP levels were evaluated in a subgroup of 263 women