Table 1.

Test numbers and exclusions

Exclusion reason (in order)	Excluded tests	Remaining tests
Total		80 077
Missing/invalid test outcome	200	79 877
Missing test date	0	79 877
Missing job category	267	79 610
Visitor job category	5030	74 580
Missing site	0	74 580
Missing sex	0	74 580
Missing age group	1	74 579
Missing test type	601	74 579
Multiple tests in single day*	132	74 447
Tests after first testing positive	2968	70 878

*Duplicates deleted; 17 people had both negative and positive tests of which one positive test was kept. Of those with matching outcomes, 31 people had different test reasons of which the highest priority one was kept in this order: symptoms, close contact, broader-defined work contact, screening, missing reason.