Table e-1. Elixhauser Comorbidity Score Components available for use in HCUP data research. Note that for this project, we removed the condition categories “Other Neurological Conditions” and “Paralysis” from our analyses.
AIDS Lymphoma
Alcohol Abuse Fluid and electrolyte disorders
Deficiency anemias Metastatic cancer
Rheumatoid arthritis/collagen vascular diseases Obesity
Chronic blood loss anemia Other Neurological Conditions
Congestive heart failure Paralysis
Chronic pulmonary disease Peripheral vascular disorders
Coagulopathy Psychoses
Depression Pulmonary circulation disorders
Diabetes, uncomplicated Renal failure
Diabetes, complicated Solid tumor without metastasis
Drug abuse Peptic ulcer disease excluding bleeding
Hypertension Valvular disease
Hypothyroidism Weight loss
Liver disease
Table e-2. Characteristics of Adult Multiple Sclerosis Hospitalizations in the United States, Nationwide Readmissions Database (NRD), 2014
Characteristic Index Hospitalization for Multiple Sclerosis, 90-day readmission sample
N=14,139 Sex n
Male 3695 (26.1)
Female 10444 (73.9)
Age
18-24 760 (5.4)
25-34 2830 (20)
35-44 3449 (24.4)
45-54 3387 (24)
55-64 2335 (16.5)
65-74 1121 (7.9)
75+ 257 (1.8)
Median Income Patient Zip Code
$1 - $37,999 3916 (27.7)
$38,000 - $47,999 3760 (26.6)
$48,000 - $63,999 3310 (23.4)
$64000+ 3153 (22.3)
Insurance
Medicare 5247 (37.1)
Medicaid 3016 (21.3)
Private insurance 4756 (33.6)
Self-Pay/no-charge/other 1120 (7.9)
Index admission disposition
Home /routine 9313 (65.9)
Inpatient post-acute care 2470 (17.5)
Home with home health care 2351 (16.6)
Other *
Elixhauser Comorbidity Index Score*
0 3756 (26.6)
1 4050 (28.6)
2 2977 (21.1)
3+ 3356 (23.7)
Comorbid Conditions **
Chronic pulmonary disease 1655 (11.7)
Deficiency anemias 1310 (9.3)
Depression 3435 (24.3)
Diabetes, complicated 343 (2.4)
Diabetes, uncomplicated 1578 (11.2)
Drug abuse 829 (5.9)
Fluid and electrolyte disorders 2270 (16.1)
Hypertension 4647 (32.9)
Hypothyroidism 1317 (9.3)
Obesity 1835 (13.0)
Psychoses 998 (7.1)
Renal failure 332 (2.3)
Rheumatoid arthritis/collagen vascular diseases 328 (2.3)
Weight loss 384 (2.7)