Traumatic Cervical Spinal Cord Injury and Income and Employment Status

Author:

Jaffe Rachael H.12,Coyte Peter C.1,Chan Brian C.-F.13,Hancock-Howard Rebecca L.1,Malhotra Armaan K.12,Ladha Karim14,Wilson Jefferson R.12,Witiw Christopher D.12

Affiliation:

1. Institute for Health Policy, Management and Evaluation, University of Toronto, Ontario, Canada

2. Division of Neurosurgery, St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada

3. KITE-Toronto Rehabilitation Institute, University Health Network, University of Toronto, Toronto, Ontario, Canada

4. Department of Anesthesiology and Pain Medicine, St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada

Abstract

ImportanceSpinal cord injury (SCI) causes drastic changes to an individual’s physical health that may be associated with the ability to work.ObjectiveTo estimate the association of SCI with individual earnings and employment status using national administrative health databases linked to income tax data.Design, Setting, and ParticipantsThis was a retrospective, national, population-based cohort study of adults who were hospitalized with cervical SCI in Canada between January 2005 and December 2017. All acute care hospitalizations for SCI of adults ages 18 to 64 years were included. A comparison group was constructed by sampling from individuals in the injured cohort. Fiscal information from their preinjury years was used for comparison. The injured cohort was matched with the comparison group based on age, sex, marital status, province of residence, self-employment status, earnings, and employment status in the year prior to injury. Data were analyzed from August 2022 to January 2023.Main outcomes and MeasuresThe first outcome was the change in individual annual earnings up to 5 years after injury. The change in mean yearly earnings was assessed using a linear mixed-effects differences-in-differences regression. Income values are reported in 2022 Canadian dollars (CAD $1.00 = US $0.73). The second outcome was the change in employment status up to 5 years after injury. A multivariable probit regression model was used to compare proportions of individuals employed among those who had experienced SCI and the paired comparison group of participants.ResultsA total of 1630 patients with SCI (mean [SD] age, 47 [13] years; 1304 male [80.0%]) were matched to patients in a preinjury comparison group (resampled from the same 1630 patients in the SCI group). The mean (SD) of preinjury wage earnings was CAD $46 000 ($48 252). The annual decline in individual earnings was CAD $20 275 (95% CI, −$24 455 to −$16 095) in the first year after injury and CAD $20 348 (95% CI, −$24 710 to −$15 985) in the fifth year after injury. At 5 years after injury, 52% of individuals who had an injury were working compared with 79% individuals in the preinjury comparison group. SCI survivors had a decrease in employment of 17.1 percentage points (95% CI, 14.5 to 19.7 percentage points) in the first year after injury and 17.8 percentage points (14.5 to 21.1 percentage points) in the fifth year after injury.Conclusions and RelevanceIn this study, SCI was associated with a decline in earnings and employment up to 5 years after injury for adults aged 18 to 64 years in Canada.

Publisher

American Medical Association (AMA)

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