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. Author manuscript; available in PMC: 2022 Nov 15.
Published in final edited form as: Brain Inj. 2021 Sep 20;35(12-13):1529–1541. doi: 10.1080/02699052.2021.1972453

Table 1.

Patient and Facility Characteristics of Younger (18-64) vs Older (65+) TBI Patients Receiving Inpatient Rehabilitation (N=221961)

Variables Values Overall
(N=221961)
Younger
(18-64)
(N=99614,
44.88%)
Older
(65+)
(N=122347,
55.12%)
p
Sociodemographic characteristics
Age Years, Mean (SD) 62.25 (21.35) 42.14 (14.68) 78.62 (7.37) NA
Sex Female 86215 (38.84%) 28548 (28.66%) 57667 (47.13%) <0.0001
Race/Ethnicity White 173617 (78.22%) 70610 (70.88%) 103007(84.19%) <0.0001
Black 18175 (8.19%) 11877 (11.92%) 6298 (5.15%)
Hispanic/Latino 15394 (6.94%) 9754 (9.79%) 5640 (4.61%)
Other 14775 (6.66%) 7373 (7.4%) 7402 (6.05%)
Marital status Never Married 57827 (26.05%) 46935 (47.12%) 10892 (8.90%) <0.0001
Married 101438 (45.70%) 37611 (37.76%) 63827 (52.17%)
Widowed 40792 (18.38%) 2173 (2.18%) 38619 (31.57%)
Separated 3029 (1.36%) 2186 (2.19%) 843 (0.69%)
Divorced 18875 (8.50%) 10709 (10.75%) 8166 (6.67%)
Pre-admission living arrangement Alone 57127 (25.74%) 19489 (19.56%) 37638 (30.76%) <0.0001
Family/Relatives 152531 (68.72%) 71020 (71.3%) 81511 (66.62%)
Friends 8850 (3.99%) 7485 (7.51 %) 1365 (1.12%)
Other 3453 (1.56%) 1620 (1.63%) 1833 (1.5%)
Discharge living arrangement ** Alone 12128 (7.76%) 4144 (5.06%) 7984 (10.71%) NA
Family/Relatives 134965 (86.31%) 72356 (88.40%) 62609 (84.01%)
Friends 4427 (2.83%) 3445 (4.21%) 982 (1.32%)
Other 4859 (3.11%) 1910 (2.33%) 2949 (3.96%)
Insurance status None 8365 (3.77%) 8190 (8.22%) 175 (0.14%) <0.0001
Medicare 124810 (56.23%) 12538 (12.59%) 112272 (91.77%)
Medicaid 18670 (8.41%) 17925 (17.99%) 745 (0.61%)
Private 66150 (29.80%) 57515 (57.74%) 8635 (7.06%)
Other 3966 (1.79%) 3446 (3.46%) 520 (0.43%)
Clinical characteristics
CMG Comorbidity Tier Tier 0/None 120271 (54.19%) 52136 (52.34%) 68135 (55.69%) <0.0001
Tier 1 14002 (6.31%) 10767 (10.81%) 3235 (2.64%)
Tier 2 42418 (19.11%) 19891 (19.97%) 22527 (18.41%)
Tier 3 45270 (20.40%) 16820 (16.89%) 28450 (23.25%)
Comorbidities Infectious and Parasitic Diseases 339 (0.15%) 79 (0.08%) 260 (0.21%) <0.0001
Neoplasms 259 (0.12%) 179 (0.18%) 80 (0.07%) <0.0001
Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders 15983 (7.20%) 4190 (4.21%) 11793 (9.64%) <0.0001
Diseases of the Blood and Blood-Forming Organs 6966 (3.14%) 2470 (2.48%) 4496 (3.67%) <0.0001
Mental Disorders 10659 (4.80%) 5592 (5.61%) 5067 (4.14%) <0.0001
Diseases of the Nervous System and Sense Organs 8930 (4.02%) 3350 (3.36%) 5580 (4.56%) <0.0001
Diseases of the Circulatory System 21164 (9.54%) 1451 (1.46%) 2239 (1.83%)
Diseases of the Respiratory System 962 (0.43%) 522 (0.52%) 440 (0.36%) <0.0001
Diseases of the Digestive System 4646 (2.09%) 1359 (1.36%) 3287 (2.69%) <0.0001
Diseases of the Genitourinary System 4508 (2.03%) 1048 (1.05%) 3460 (2.83%) <0.0001
Diseases of the Skin and Subcutaneous Tissue 984 (0.44%) 381 (0.38%) 603 (0.49%) <0.0001
Diseases of the Musculoskeletal System and Connective Tissue 6749 (3.04%) 2583 (2.59%) 4166 (3.41%) <0.0001
Symptoms, Signs, And Ill-Defined Conditions 20956 (9.44%) 8408 (8.44%) 12548 (10.26%) <0.0001
Injury and Poisoning 1826 (0.82%) 1165 (1.17%) 661 (0.54%) <0.0001
Supplementary Classification of External Causes of Injury and Poisoning 2267 (1.02%) 687 (0.69%) 1580 (1.29%) <0.0001
Supplementary Classification of Factors Influencing Health Status and Contact with Health Service 15316 (6.90%) 6555 (6.58%) 8761 (7.16%) <0.0001
Complications Infectious and Parasitic Diseases 504 (0.23%) 152 (0.15%) 352 (0.29%) <0.0001
Neoplasms 155 (0.07%) 113 (0.11%) 42 (0.03%) <0.0001
Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders 6884 (3.10%) 2215 (2.22%) 4669 (3.82%) <0.0001
Diseases of The Blood and Blood-Forming Organs 2552 (1.15%) 1034 (1.04%) 1518 (1.24%) <0.0001
Mental Disorders 3357 (1.51%) 1650 (1.66%) 1707 (1.4%) <0.0001
Diseases of The Nervous System and Sense Organs 1262 (0.57%) 679 (0.68%) 583 (0.48%) <0.0001
Diseases of The Circulatory System 3690 (1.66%) 1451 (1.46%) 2239 (1.83%) <0.0001
Diseases of The Respiratory System 508 (0.23%) 176 (0.18%) 332 (0.27%) <0.0001
Diseases of the Digestive System 943 (0.42%) 478 (0.48%) 465 (0.38%) <0.0001
Diseases of The Genitourinary System 1900 (0.86%) 445 (0.45%) 1455 (1.19%) <0.0001
Diseases of the Skin and Subcutaneous Tissue 1015 (0.46%) 469 (0.47%) 546 (0.45%) 0.3939
Diseases of the Musculoskeletal System and Connective Tissue 3065 (1.38%) 1563 (1.57%) 1502 (1.23%) <0.0001
Symptoms, Signs, And Ill-Defined Conditions 12178 (5.49%) 5242 (5.26%) 6936 (5.67%) <0.0001
Injury and Poisoning 322 (0.15%) 181 (0.18%) 141 (0.12%) <0.0001
Supplementary Classification of External Causes of Injury and Poisoning 577 (0.26%) 245 (0.25%) 332 (0.27%) 0.2423
Supplementary Classification of Factors Influencing Health Status and Contact with Health Service 1352 (0.61%) 698 (0.7%) 654 (0.53%) <0.0001
Admission Motor Function Admission FIM Motor Score, Mean (SD) 36.41 (14.06) 38.03 (15.74) 35.09 (12.37) <0.0001
Admission Cognitive Function Admission FIM Cognitive Score, Mean (SD) 17.97 (7.62) 16.79 (7.88) 18.93 (7.27) <0.0001
Discharge Motor Function Discharge FIM Motor Score, Mean (SD) 60.94 (14.93) 64.78 (14.80) 57.83 (14.29) <0.0001
Discharge Cognitive Function Discharge FIM Cognitive Score, Mean (SD) 24.51 (6.61) 24.39 (6.67) 24.60 (6.56) <0.0001
Days Onset to Admission Number of days, Mean (SD) 14.74 (21.25) 19.83 (25.69) 10.59 (15.61) <0.0001
Length of Stay Number of days, Mean (SD) 16.11 (12.45) 17.89 (16.41) 14.67 (7.58) <0.0001
Year of Admission 2002 10459 (4.71%) 6107 (6.13%) 4352 (3.56%) <0.0001
2003 10663 (4.80%) 5971 (5.99%) 4692 (3.83%)
2004 11046 (4.98%) 5885 (5.91%) 5161 (4.22%)
2005 12415 (5.59%) 6586 (6.61%) 5829 (4.76%)
2006 12719 (5.73%) 6628 (6.65%) 6091 (4.98%)
2007 12840 (5.78%) 6462 (6.49%) 6378 (5.21%)
2008 13848 (6.24%) 6863 (6.89%) 6985 (5.71%)
2009 14025 (6.32%) 6345 (6.37%) 7680 (6.28%)
2010 13512 (6.09%) 6175 (6.2%) 7337 (6%)
2011 13674 (6.16%) 6071 (6.09%) 7603 (6.21%)
2012 14276 (6.43%) 6157 (6.18%) 8119 (6.64%)
2013 14292 (6.44%) 6096 (6.12%) 8196 (6.7%)
2014 10060 (4.53%) 4091 (4.11%) 5969 (4.88%)
2015 13876 (6.25%) 4975 (4.99%) 8901 (7.28%)
2016 13748 (6.19%) 4970 (4.99%) 8778 (7.17%)
2017 15109 (6.81%) 5215 (5.24%) 9894 (8.09%)
2018 15399 (6.94%) 5017 (5.04%) 10382 (8.49%)
Facility Characteristics
IRF location Region P01 : CT, MA, ME, NH, RI, VT 10501 (4.73%) 4234 (4.25%) 6267 (5.12%) <0.0001
Region P02 : NJ, NY, PR 19707 (8.88%) 8359 (8.39%) 11348 (9.28%)
Region P03 : DE, MD, PA, VA, WV 30555 (13.77%) 12530 (12.58%) 18025 (14.73%)
Region P04: AL, FL, GA, KT, MS, NC, TN, SC 39579 (17.83%) 17185 (17.25%) 22394 (18.3%)
Region P05: IL, IN, MI, MN, OH, WI 33136 (14.93%) 15026 (15.08%) 18110 (14.8%)
Region P06: AR, LA, NM, OK, TX 28047 (12.64%) 11246 (11.29%) 16801 (13.73%)
Region P07: IA, KS, MO, NE 13683 (6.16%) 6658 (6.68%) 7025 (5.74%)
Region P08: CO, MT, ND, SD, UT, WY 12301 (5.54%) 7473 (7.5%) 4828 (3.95%)
Region P09: AZ, CA, HI, NV 27503 (12.39%) 12825 (12.87%) 14678 (12%)
Region P10: AK, ID, OR, WA 6949 (3.13%) 4078 (4.09%) 2871 (2.35%)
IRF type Freestanding 80421 (36.23%) 35023 (35.16%) 45398 (37.11%) <0.0001
Rehab Unit in Hospital 141540 (63.77%) 64591 (64.84%) 76949 (62.89%)
IRF accreditation Accreditation (Joint Commission and/or CARF) 140971 (63.51%) 70609 (70.88%) 70362 (57.51%) <0.0001
No accreditation 80990 (36.49%) 29005 (29.12%) 51985 (42.49%)
Discharge Destination Home/community settings 186460 (84%) 88894 (89.24%) 97566 (79.75%) <0.0001
Subacute settings 35501 (16%) 10720 (10.76%) 24781 (20.25%)

Note:

**

Discharge living arrangement only reported for those who went home, N=65582 missing; FIM = Functional Independence Measure; CARF = Commission on Accreditation of Rehabilitation Facilities; CMG = case mix group