Selenium Level in Patients with Vitiligo: A Meta-Analysis

Table 1

Characteristics of the 8 studies included for meta-analysis.

Study/year	Country	Skin type	Sample	Age, (range)	Vitiligo/control	Type/stage	Case	Control	Uni/methods	NOS score
Teherani and Nagy-Vezekenyi [24]	Austria	NA	Blood	(9-16)	5/8	10-25% body surface			μg/g dry weight neutron activation analysis	4
Tu et al. [26]	China	NA	Serum	29.1 (18-51)	29/37	Localized 13; Segmental 5; Generalized 11			μg/L fluorescence spectrophotometry	7
Beazley et al. [19]	Germany	II (n.5); III (n.53); IV (n.3)	Serum	38.9 ()	61/5932	Vulgaris 44; Acrofacial 13; Segmental 2; Focal form 1; Totalis 1; (2 active stages)			μmol/L atomic absorption spectrophotometry	6
Kang et al. [27]	China	Dark-skinned patients	Serum	(3-64)	30/34	3 m-30 y			mg/L	5
Ozturk et al. [25]	Turkey	NA	Plasma	(16-43)	30/30	Generalized; Stable			Ppb fluorescence spectrophotometer	7
Barikbin et al. [17]	Iran	III or IV	Serum	31.8 (9-82)	60/45	Vulgaris			μmol/L flameless atomic absorption method	6
Zhao et al. [28]	China	II	Serum	(3-65)	36/16	Active 18/stable 18; Localized 16; Generalized 17; Scattered 2; Segmental 1			ng/L	6
Wacewicz et al. [18]	Poland	NA	Serum	(21-73)		Generalized			μg/L electrothermal atomic absorption spectrometry method	7