Genotype frequencies of participants.

Genotype frequencies given as percentages. Abbreviations used: SD = standard deviation, L = litre. Tests used: Chi-square test for comparison of genotype frequencies between CARMS 1–5 and between CARMS 5 with subretinal fibrosis and CARMS 5 without subretinal fibrosis, and one-way ANOVA test for comparison of plasma 25-hydroxyvitamin D concentrations between different genotypes. No significant differences were found in the genotype frequencies between CARMS 1–5, or in the 25-hydroxyvitamin D concentrations between different genotypes. *Genotype missing for 4 patients with CARMS 5. **Genotype missing for 1 patient with CARMS 4. ***Genotype missing for 1 patient with CARMS 5.