Table 5.

Correlation between PSQI score with age, anthropometric measurements, body composition parameters, and inflammatory biomarker of the study at baseline and after 31 days of active stage of VLCKD

n = 324	Baseline		Day 31 of VLCKD
Parameters	r	*p-value	r	*p-value
Age (years)	− 0.039	0.487	− 0.004	0.945
Weight (kg)	0.756	< 0.001	0.641	< 0.001
BMI (kg/m2)	0.677	< 0.001	0.615	< 0.001
WC (cm)	0.541	< 0.001	0.498	< 0.001
BIA parameters
R (Ω)	0.013	0.821	0.071	0.200
Xc (Ω)	− 0.262	< 0.001	0.001	0.996
FFM (kg)	0.282	< 0.001	0.229	< 0.001
FM (kg)	0.808	< 0.001	0.699	< 0.001
FFM (%)	− 0.734	< 0.001	− 0.631	< 0.001
FM (%)	0.734	< 0.001	0.631	< 0.001
PhA (°)	− 0.355	< 0.001	− 0.079	0.154
ahs-CRP levels (mg/L)	0.269	< 0.001	0.141	0.023

PSQI Pittsburgh Sleep Quality Index, SD standard deviation, VLCKD very low-calorie ketogenic diet, BMI body mass index, WC waist circumference, R resistance, Xc reactance, FFM free fat mass, FM fat mass, 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