Table 1.

Distribution by selected characteristics of adult patients on dialysis with continuous enrollment in Medicare Part A, B, and D, 2006–2010

Characteristicsa	2006, n=100,809, %	2007, n=133,323, %	2008, n=140,174, %	2009, n=143,217, %	2010, n=153,758, %
Opioid prescription
None	36.9	37.4	37.1	36.6	36.0
Short term	43.1	42.4	41.5	41.0	40.6
Chronic	20.0	20.2	21.4	22.3	23.4
Analgesic prescription
Yes	15.2	14.2	13.9	14.0	14.2
Age group, yr
20–44	19.3	17.4	17.1	16.8	16.4
45–64	42.5	42.2	42.5	43.1	43.5
65+	38.2	40.4	40.5	40.1	40.2
Sex
Men	49.4	51.4	51.8	51.9	52.2
Race
Black	45.8	43.7	42.9	42.4	42.0
White	48.1	50.6	51.3	51.8	52.2
Other	6.1	5.8	5.8	5.8	5.8
Dual statusb
Yes	85.3	72.6	71.8	71.3	70.9
Residential area
Large metropolitan	52.0	50.9	51.0	51.2	51.3
Medium/small metropolitan	28.9	29.7	29.7	29.8	29.7
Nonmetropolitan	19.1	19.5	19.4	19.1	19.0
ESRD vintage, yr
1–2	18.0	18.1	17.1	16.9	16.6
3–4	31.3	31.2	31.3	30.5	29.6
5+	50.8	50.7	51.7	52.7	53.8
Dialysis modalityc
HD	94.6	94.2	94.3	94.4	94.3
History of kidney transplantation
Yes	7.9	7.6	7.7	7.7	7.6
Nursing home residenced
Yes	11.4	10.5	11.0	11.0	11.5
Cancere
Yes	4.4	4.9	5.1	5.3	5.4
Prior pain-related hospitalization
Yes	5.1	5.5	6.0	6.0	6.7
No. of prior hospitalizations
0	38.8	40.3	40.9	41.4	41.9
1–2	34.6	35.3	34.4	34.3	34.5
3–4	14.7	14.0	13.7	13.5	13.4
5 or more	11.9	10.5	11.0	10.8	10.2

^aThe same patient might have been included in multiple years.

^bDual status in Medicare and Medicaid.

^cThe last modality in the study year.

^dOn the basis of one or more claims in physician/carrier files.

^eOn the basis of one or more inpatient stays with a cancer diagnosis and CMS Form 2728.