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Table 2

Baseline characteristics of WSIB low back pain claims (n=1442)

Age in years, mean (SD)41.3 (10.5)
Gender, n (%)
 Female552 (38.3)
 Male890 (61.7)
First language, n (%)
 English1372 (95.1)
 Other70 (4.9)
Predisability income (dollars/week) mean (SD)731.4 (332.5)
Opioid prescription reimbursed by WSIB in the first 4 weeks of claim, n (%)
 Yes136 (9.4)
 No1306 (90.6)
Prior WSIB claim, n (%)
 Yes1091 (75.7)
 No351 (24.3)
Union membership, n (%)
 Yes610 (42.3)
 No656 (45.5)
 Missing data176 (12.2)
Employer RTW programme, n (%)
 Yes1042 (72.3)
 No278 (19.3)
 Missing data122 (8.5)
Employer doubts work-relatedness of injury, n (%)
 Yes195 (13.5)
 No1051 (72.9)
 Missing data196 (13.6)
Chiropractic care reimbursed by WSIB during claim, n (%)391 (27.1)
 Early Chiropractic care (≥3 treatments received within the first 28 days), n (%)247 (17.1)
Physiotherapy reimbursed by WSIB during claim, n (%)786 (54.5)
 Early Physiotherapy (≥3 treatments received within the first 28 days), n (%)388 (26.9)

RTW, return to work; WSIB, Workplace Safety and Insurance Board.

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