Table 6. Mean May-adjusted vitamin D (nmol/L) according to season of venepuncture (high season (April-September, n = 96) vs low season (October-March, n = 185)) in people over 50 who take a holiday outside the UK at least once a year.

Linear regression with May-adjusted vitamin D as the outcome.

	Std Beta	Beta (95% CI)	Std error	p-value
High season over-50s	0.17	7.86 (3.57–12.2)	2.18	0.00035
Low season over-50s	0.19	8.33 (5.23–11.4)	1.57	1.75x10-7