Table 2. Reason for missed diagnostic opportunities 2013–2015.

Type of Error	Classification	2013	2014	2015
Pre-Analytical Error	Insufficient sample	7 790 (43.3%)	4 019 (26.1%)	3 716 (18.2%)
	Unsuitable sample	2 045 (11.4%)	3 184 (20.7%)	3 986 (19.6%)
	Clerical error	1 478 (8.2%)	2 012 (13.1%)	3 630 (17.8%)
	Pre-analytical lab error	1 419 (7.9%)	1 578 (10.3%)	2 515 (12.3%)
Analytical Error	Indeterminate	2 890 (16.0%)	2 900 (18.8%)	3 246 (15.9%)
	Invalid	1 685 (9.4%)	1 004 (6.5%)	2 429 (11.9%)
	Lab error not specified	7 02 (3.9%)	691 (4.5%)	853 (4.2%)
Total	MDOs	18 009	15 388	20 375