Table 3.

Spearman correlation coefficient (r) and P value between serum Cu, Zn, age of onset and gender in patients

Correlation between	r (P value)
Serum Cu and serum Zn	0.144 (0.252)
Serum Cu and age of onset
Early onset	0.251 (0.039)
Late onset	0.042 (0.774)
Serum Zn and age of onset
Early onset	0.157 (0.362)
Late onset	0.189 (0.175)
Serum Cu or Zn and skin type
Type III	0.207 (0.097)
Type IV	0.071(0.688)
Serum Cu or Zn and clinical type of vitiligo
Generalized	0.022 (0.844)
Localized	0.453 (0.105)
Serum Cu or Zn and clinical type of vitiligo
Segmental	0.20 (0.045)
Non-segmental	0.062 (0.666)
Serum Zn and the duration of disease	−0.018 (0.862)
Serum Cu and the duration of disease	0.256 (0.010)
Serum Zn in male and the duration of disease	−0.186 (0.252)
Serum Zn in female and the duration of disease	0.058 (0.662)
Serum Cu in male and the duration of disease	0.112 (0.448)
Serum Cu in female and the duration of disease	0.225 (0.034)

Cu = copper; Zn = zinc.