BUN	blood urea nitrogen
CCr	creatinine clearance
CI	confidence interval
CKD	chronic kidney disease
CoQ10	coenzyme Q10
CRP	C-reactive protein
DN	diabetic nephropathy
eGFR	estimated glomerular filtration rate
ESKD	end stage kidney disease
ESRD	end-stage renal disease
GRADE	Grading of Recommendations Assessment, Development, and Evaluation
hs-CRP	high-sensitivity C-reactive protein
IL-6	interleukin 6
IS	indoxyl sulphate
MD	mean difference
MDA	malondialdehyde
OIS	optimal information size
PCS	p-cresyl sulphate
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PUFA	polyunsaturated fatty acid
RCTs	randomized-controlled trials
RoB	risk of bias
RR	risk ratio
SCr	serum creatinine
SMD	standardized mean difference
SR	systematic review
T1DN	type 1 diabetic nephtopathy
T2DN	type 2 diabetic nephtopathy
TNF-α	tumor necrosis factor-alpha
UACR	urine albumin creatinine ratio
UAER	urinary albumin excretion rate
UPCR	urine protein creatinine ratio