Hazard 2000.

Methods	RCT
Participants	N=489; Mean age (yrs): 37.7; Gender (female): 40%; Diagnosis: reported LBP within 11 days after an occupational injury, unclear whether sciatica was included. Setting: occupational
Interventions	(E1) 'Back Home' booklet with biopsychosocial information and usual care (N=63); (E2) 'Back Home' booklet with biopsychosocial information plus advice to perform exercises and usual care (N=56); (E3) Advice to perform exercises and usual care (N=61); (C) Usual care: no booklet nor exercises (N=59).
Outcomes	Back pain specific functional status: Pain/function score (0 to 100), mean change and 95% CI at 1 and 3 wk: (E1) vs. (C) ‐8.7 (‐17.4 to ‐0.03), # ‐6.3 (‐14.6 to 2.0) (E2) vs. (C) ‐0.1 (‐9.0 to 8.9), ‐4.0 (‐12.6 to 4.6) (E3) vs. (C) ‐7.9 (‐16.7 to 0.8), # ‐1.4 (‐9.9 to 7.1) Aberdeen Pain & Function scale (0 to 100), mean change and 95% CI at 1 wk: (E1) vs. (C) ‐3.8 (‐7.7 to 0.1) # (E2) vs. (C) ‐1.9 (‐5.8 to 2.1) (E3) vs. (C) ‐5.3 (‐9.3 to ‐1.4) #
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Unclear from text.
Allocation concealment?	Low risk	A ‐ Adequate
Blinding? All outcomes ‐ patients?	Unclear risk	Unclear from text.
Blinding? All outcomes ‐ providers?	Low risk
Blinding? All outcomes ‐ outcome assessors?	Low risk
Incomplete outcome data addressed? All outcomes ‐ drop‐outs during intervention?	Low risk
Incomplete outcome data addressed? All outcomes ‐ drop‐outs during follow‐up?	Low risk
Incomplete outcome data addressed? All outcomes ‐ ITT analysis?	High risk
Similarity at baseline characteristics?	Low risk
Co‐interventions avoided or similar?	High risk
Compliance acceptable?	Unclear risk	Unclear from text.