Table 2.

Participant characteristics of both primary and validation cohorts, stratified by cases and controls

Participant characteristics	Cases	Controls
Primary cohort: Lancashire Teaching Hospitals NHS Foundation Trust (n = 59 368)
Age (years), median [IQR]	73.7 [60.3-82.6]	52.8 [36.3-68.7]
Female sex, n (%)	472 (45.6)	38 000 (66.3)
Serum 25(OH)D (nmol/L), mean (SD)	35.0 [21.0-57.0]	50.0 [34.2-66.9]
Validation cohort: Tameside and Glossop Integrated Care NHS Foundation Trust (n = 21 234)
Age (years), median [IQR]	72.5 [60.1-81.5]	54.5 [39.3-69.7]
Female sex, n (%)	345 (44.7)	14 182 (69.3)
Serum 25(OH)D (nmol/L), mean (SD)	33.0 [19.4-54.1]	47.1 [31.8-64.7]

Abbreviations: 25(OH)D, 25-hydroxyvitamin D; IQR, interquartile range.