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# Table 2 Calculation of standardised cumulative doses for the three different situations in the trial.

Situation Treatment location UVB equipment Treatment schedule Cumulative Dose (CD) Standardisation factor F
1 In the hospital With intensity indicator in J/cm2 CD = CD h × F $F = I A I h × I s r I c A MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGgbGrcqGH9aqpdaWcaaqaaiabdMeajnaaBaaaleaacqWGbbqqaeqaaaGcbaGaemysaK0aaSbaaSqaaiabdIgaObqabaaaaOGaey41aq7aaSaaaeaacqWGjbqsdaWgaaWcbaGaem4CamNaemOCaihabeaaaOqaaiabdMeajnaaBaaaleaacqWGJbWycqWGbbqqaeqaaaaaaaa@3DD2@$
2 In the hospital Without intensity indicator in time (seconds) CD = CTT × I A × F $F = I c A I c A × I s r I c A MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGgbGrcqGH9aqpdaWcaaqaaiabdMeajnaaBaaaleaacqWGJbWycqWGbbqqaeqaaaGcbaGaemysaK0aaSbaaSqaaiabdogaJjabdgeabbqabaaaaOGaey41aq7aaSaaaeaacqWGjbqsdaWgaaWcbaGaem4CamNaemOCaihabeaaaOqaaiabdMeajnaaBaaaleaacqWGJbWycqWGbbqqaeqaaaaaaaa@4022@$
3 At home Without intensity indicator in time (seconds) $C D = C T T × I B 1 + I B 2 2 × F MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGdbWqcqWGebarcqGH9aqpcqWGdbWqcqWGubavcqWGubavcqGHxdaTdaWcaaqaaiabdMeajnaaBaaaleaacqWGcbGqcqaIXaqmaeqaaOGaey4kaSIaemysaK0aaSbaaSqaaiabdkeacjabikdaYaqabaaakeaacqaIYaGmaaGaey41aqRaemOrayeaaa@4108@$ $F = I c A I c B × I s r I c A MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGgbGrcqGH9aqpdaWcaaqaaiabdMeajnaaBaaaleaacqWGJbWycqWGbbqqaeqaaaGcbaGaemysaK0aaSbaaSqaaiabdogaJjabdkeacbqabaaaaOGaey41aq7aaSaaaeaacqWGjbqsdaWgaaWcbaGaem4CamNaemOCaihabeaaaOqaaiabdMeajnaaBaaaleaacqWGJbWycqWGbbqqaeqaaaaaaaa@4024@$
1. CD = Cumulative Dose (J/cm 2) standardised for the study.
2. CD h = Cumulative Dose (J/cm 2) as calculated by the hospital (retrieved from treatment chart).
3. CTT = Cumulative Treatment Time (s) as retreived from the diary and/or treatment chart.
4. F = correction factor for standardisation.
5. Measurements on location:
6. I A = Intensity (mW/cm 2) as measured by the investigators for each hospital UVB unit with portable intensity meter A.
7. I h = Intensity (mW/cm 2) as simultaneously measured by the hospitals' UVB unit irradiation intensity indicator.
8. I B1= Intensity (mW/cm 2) measured by the home care organisations before start of first treatment, using their meters (B).
9. I B2= Intensity (mW/cm 2) measured by the home care organisations after finishing last treatment, using their meters (B).
10. Measurements during calibration:
11. I cA = Intensity (mW/cm 2) as measured during calibration by the investigators' portable intensity meter A.
12. I cB = Intensity (mW/cm 2) as measured during calibration by the intensity meters (B) of the home care organisations.
13. I sr = Intensity (mW/cm 2) as measured during calibration with the High Accuracy Spectroradiometer type OL 752