Table 1. Characteristics of Opioid Analgesic Use by Duration of Use for All Users and Daily Users, 2008–2010

Characteristics by User Group	Time Period of Opioid Use												Mean Use
	Jan-June 2008		July-Dec 2008		Jan-June 2009		July-Dec 2009		Jan-June 2010		July-Dec 2010
	Mean	Median	Mean	Median	Mean	Median	Mean	Median	Mean	Median	Mean	Median
All users^*
Days of use
Group 1	8	5											8
Group 2	16	6	14	6									15
Group 3	26	10	28	10	21	9							25
Group 4	40	16	43	20	42	20	33	15					40
Group 5	50	25	55	30	55	30	53	30	37	20			50
Group 6	98	92	107	114	110	120	115	128	115	130	116	132	110
Daily dosage (MME)
Group 1	52	37.5											52
Group 2	50	37.5	50	38									50
Group 3	50	36	50	36	48	37							49
Group 4	50	35	50	35	50	35	50	35					50
Group 5	53	35	52	35	52	34	52	34	50	33			52
Group 6	72	38	74	39	75	40	77	40	79	40	80	40	76
Daily users^{^†}
Days of use
Group 1	134	137											134
Group 2	138	145	76	60									107
Group 3	142	150	116	120	66	57							108
Group 4	147	153	130	146	112	120	76	60					116
Group 5	148	160	137	150	125	144	115	127	70	60			119
Group 6	157	167	154	168	151	166	154	169	150	166	150	168	153
Daily dosage (MME)
Group 1	54	34											54
Group 2	70	39	66	38									68
Group 3	69	37	69	37	61	36							66
Group 4	74	40	75	40	75	40	71	39					74
Group 5	83	41	80	41	83	40	81	40	72	38			80
Group 6	101	46	105	47	108	48	111	50	113	51	114	51	109

Data from Truven Health MarketScan.
↵* Among all users, group 1 included 474,211 patients; group 2, 104,602 patients; group 3, 37,062 patients; group 4, 19,481 patients; group 5, 12,302 patients; and group 6, 141,799 patients. Total number of patients was 789,457.
↵† Among daily users, group 1 included 1,026 patients; group 2, 2,255 patients; group 3, 1,988 patients; group 4, 2,033 patients; group 5, 1,885 patients; and group 6, 62,066 patients. Total number of patients was 71,253.
MME, morphine milligram equivalent.