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Table 2 Algorithm for Estimation of SE Score for Individuals

From: Development and validation of sunlight exposure measurement questionnaire (SEM-Q) for use in adult population residing in Pakistan

Variable/item Percentage given Explanation
Part of the body exposed (clothing) 1 if exposed 1 = 100% UVB can penetrate.
  0 if not exposed/covered  
0.5 if partially covered
Application of sunscreen/cosmetics on different parts of body (SPF) 1 if no use of any products 1 = 100% UVB
  0.08 if sunscreen and SPF 15 and above 0.08 = 8% UVB penetrates i.e. blocks 92%
0.9 if use of other creams and lotions without knowledge of SPF 0.9 = 90% UVB absorption
Sun protection practices 1 if no protection practices 1 = 100% UVB absorption
  0.4 if used shade of tree/building etc. 0.4 = 40% UVB available for absorption
Weather outdoors 1 if sunny 1 = 100% UVB on a sunny day
  0.5 if cloudy 0.5 = 50% UVB on a cloudy day
0.75 if sunny/cloudy 0.75 = 75% UVB if light clouds and sunny
Glass windows of car/bus/van 0.1 if glass windows up 0.1 = 10% UVB absorption through glass windows, 90% blocked
  0.4 if windows down 0.4 = 40% UVB available for absorption into skin
Skin tone Type 1 - 0.8 80% UVB penetration
  Type II - 0.675 67.5% UVB penetration
Type III - 0.55 55% UVB penetration
Type IV - 0.425 42.5% UVB penetration
  Type V - 0.3 30% UVB penetration by skin