Table 3.

Total number of problem events per site and their specific distribution (percentages are calculated over the total number of problem events per site) according to the criteria set in each step.

	Problem events (#)	Missing codes (%)	Code mismatch (%)	Diagnosis text mismatch (%)
Centre 1	304342	7.2	12.7	49.5
Centre 2	334232	4.6	2.3	70.0
Centre 3	208139	0	0.3	69.2
GP 1	109129	3.8	0.6	6.7
GP 2	17925	5.3	6.5	24.8
GP 3	10512	0	5.0	26.4
GP 4	108394	36.1	0.7	25.1
GP 5	137635	2.0	0.6	15.4
GP 6	7971	0	2.3	44.2
GP 7	30500	6.7	2.6	77.7
GP 8	71004	3.9	5.6	73.6
GP 9	160811	2.6	2.8	82.1
Totals	1500594	6.2	4.0	53.8

GP: General Practitioner