Figure 2From: Economic burden of vulvar and vaginal intraepithelial neoplasia: retrospective cost study at a German dysplasia centre Trend curve for mean direct medical cost per case. Zij = (Xij - μ)/σ {i = 1, 2, 3; j = 1, 2, ..., 6} Xij: mean cost per case of category i in time period j VDP: visit(s) at dysplasia outpatient department or office based specialist for diagnostic purposesBack to article page