Table 2.

Quarterly rates of pre-analytical indicators.

Year-Quarter	Total Requests, N	Haemolysis, %	Clotted, %	Inadequate container, %	Insufficient sample, %	No blood sent, %	No urine sent, %	Total incidents, %	Non-conformity critical error, %	LIS critical error, %	Total critical errors, N
2007-1	36,420	9.26	1.56	0.11	0.43	1.24	2.14	14.74		0.055
2007-2	36,587	7.66	1.28	0.14	0.28	1.22	1.73	12.30		0.025
2007-3	32,812	8.31	1.80	0.11	0.25	1.44	1.64	13.55		0.037
2007-4	35,742	9.12	1.79	0.14	0.40	1.58	1.51	14.54		0.053
2008-1	37,340	11.90	1.93	0.11	0.52	1.42	1.63	17.50	0.024	0.035	0.059
2008-2	39,747	10.29	1.34	0.10	0.34	1.32	1.56	14.96	0.033	0.045	0.078
2008-3	34,716	10.38	1.59	0.06	0.41	1.20	1.79	15.42	0.023	0.009	0.032
2008-4	37,708	10.78	1.61	0.05	0.33	1.33	1.88	15.98	0.019	0.037	0.056
2009-1	40,554	13.44	1.62	0.10	0.40	1.45	1.73	18.75	0.015	0.015	0.030
2009-2	40,071	10.34	1.35	0.11	0.39	1.39	1.75	15.33	0.017	0.042	0.060
2009-3	34,906	7.68	1.25	0.05	0.49	1.41	1.64	12.53	0.017	0.017	0.034
2009-4	37,871	7.39	1.19	0.04	0.41	1.32	1.61	11.97	0.024	0.050	0.074
2010-1	39,496	7.64	1.22	0.04	0.39	1.11	1.71	12.11	0.013	0.020	0.033
2010-2	39,750	5.85	1.15	0.06	0.27	1.03	1.40	9.76	0.030	0.023	0.053
2010-3	34,700	5.65	1.46	0.07	0.33	1.19	1.53	10.22	0.026	0.012	0.037
2010-4	37,111	7.60	1.24	0.05	0.26	1.28	1.46	11.90	0.019	0.013	0.032
2011-1	40,803	8.19	1.17	0.05	0.28	1.06	1.70	12.45	0.039	0.020	0.059
2011-2	41,617	8.24	1.01	0.06	0.19	1.18	1.73	12.41	0.024	0.036	0.060
2011-3	35,773	7.68	1.40	0.05	0.26	1.43	1.49	12.30	0.011	0.011	0.022
2011-4	37,717	7.28	1.42	0.03	0.35	1.48	1.52	12.09	0.016	0.011	0.027
TOTAL/Mean	751,441	8.76	1.41	0.08	0.35	1.30	1.66	13.54	0.022	0.028	0.047
P*		0.039	0.491	0.314	0.491	0.041	0.265	0.003	0.578	0.619	0.196

Pre-analytical indicators are presented as a frequency of total number of requests;

^*P value of Runs Test.