Risk for Occupational Low-Back Injury after Lumbar Laminectomy for Degenerative Disc Disease

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Abstract
Thirty-two Postal Service applicants who had undergone laminectomies were classified as low risk for back injury after preplacement examinations and were subsequently hired for employment. Each was compared with six control subjects, who were matched by age, gender, date of hire, and job classification. The odds ratios for occupational back injury with 95% confidence intervals were 5.9 (1.9-18.8) overall and 9.1 (1.5-73.8) for letter carriers. Of subjects, 25% were injured, compared with 6% of controls. The median elapsed time between surgery and hire was 5.9 years for injured subjects and 6.8 years for uninjured subjects. A rank sum test comparing the elapsed times of the two groups was not significant (P = 0.30). Postal workers are at increased risk for back injury after laminectomy. The risk does not appear to decrease with increased time since surgery.

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