Table 2: Main characteristics of studies on continuous outcomes of vitamin D levels in NAFLD and controls, chronologically ordered.

Study YearControlNAFLDP-value
Age
(mean ± SD)
No.
(Female/male)
25(OH)D (ng/ml)
(mean ± SD)
Age
(mean ± SD)
No.
(Female/male)
25(OH)D (ng/ml)
(mean ± SD)

Sezer et al.[17]201612.60±3.1053(38/15)14.60±7.0012.90±2.2058(26/32)16.60±6.200.113
Mohamed et al. [26]201610.60±3.1023(14/9)41.98±14.5211.13±2.7047(28/19)20.89±16.56<0.001
Malespin et al. [27]201512.90±2.90382(193/189)20.80±7.1013.00±2.4025(6/19)16.50±6.400.024
Chang et al. [23]20158.70±3.8732(NR)17.70±5.0511.46±2.5362(NR)17.90±6.840.963
Yildiz et al. [24]201411.00±2.8043(24/19)16.40±9.1911.90±2.8058(22/36)12.60±6.520.005
Black et al.[28]201417838(381/457)30.85±9.6217156(96/60)26.84±8.81<0.001
Nobili et al. [29]201312.24±7.2385(32/53)29.04±5.8113.00±2.9673(NR)19.30±6.70<0.001
Pirgon et al. [25]201312.48±1.6072(NR)43.96±19.9712.80±0.8045(NR)29.50±18.40<0.05

The levels of 25(OH)D were compared between NAFLD and control groups; SD: standard deviation; NR: not reported.