Vitamin D production after UVB: Aspects of UV-related and personal factors

Figures & data

Table I. Increase (mean) in 25(OH)D3 (nmol/L) after exposure to UVB (0.75 – 3.0 SED) of different body areas (6 % – 24 %). A total of 92 participants were included. The number of participants is given in brackets and standard deviations in square brackets. Modified from [10].

UVB dose (SED)	Exposed body area (%)			P (R^2)
	6 %	12 %	24 %
0.75 (32)	1.9 [5.7] (11)	9.0 [8.0] (11)	19.9 [6.4] (10)	<0.01 (0.56)
1.5 (30)	13.5 [10.5] (10)	13.4 [11.6] (10)	19.7 [9.2] (10)	0.15 (0.073)
3.0 (30)	22.7 [10.1] (10)	30.7 [18.3] (10)	25.0 [3.5] (10)	0.90 (0.001)
P (R^2)	<0.01 (0.48)	<0.01 (0.35)	0.08 (0.11)

Bogh MK, Schmedes AV, Philipsen PA, Thieden E and Wulf HC. Interdependence between body surface area and UVB dose in vitamin D production: a randomized controlled trial. Br J Dermatol 2011;164:163–169.

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