Table 2.

Impact of perturbation algorithms on slope and coefficient of correlation for five consecutive monotonic results for patients' hematocrit (PCV, packed cell volume) tests

Laboratory test	Result sets (n)	Perturbation rate	Perturbation algorithm	Bins spanned	Original slope	Perturbation slope	Slope difference (%)	Original R	Perturbation R	R difference (%)
PCV	1407	5	Simple	1	−2.49	−2.21	12	−0.97	−0.90	7.2
PCV	1407	5	Expert	1	−2.49	−2.28	8.4	−0.97	−0.91	6.5
PCV	1407	15	Simple	1	−2.49	−2.33	6.4	−0.97	−0.73	25
PCV	1407	15	Expert	1	−2.49	−2.66	6.6	−0.97	−0.78	19.2
PCV	951	5	Simple	2	−3.42	−3.06	11	−0.96	−0.92	5.1
PCV	951	5	Expert	2	−3.42	−3.11	9.1	−0.96	−0.92	4.9
PCV	951	15	Simple	2	−3.42	−3.15	7.8	−0.96	−0.80	17.3
PCV	951	15	Expert	2	−3.42	−3.33	2.8	−0.96	−0.83	14
PCV	98	5	Simple	3	−5.35	−5.03	6.0	−0.95	−0.90	5.2
PCV	98	5	Expert	3	−5.35	−4.82	9.9	−0.95	−0.89	5.7
PCV	98	15	Simple	3	−5.35	−4.86	9.0	−0.95	−0.86	8.6
PCV	98	15	Expert	3	−5.35	−5.44	1.7	−0.95	−0.87	7.7