McKinney 1989.

Methods	RCT; randomisation procedure not described; blinded outcome assessment.
Participants	Acute flexion‐extension neck sprain (less than 72 h). N=170.
Interventions	E1: Active physiotherapy (mobilisation, hot and cold applications, short wave diathermy, hydrotherapy, traction, active and passive movements according to McKenzie and Maitland, 3 times a week (40 min), 6 weeks (n=71). E2: mobilisation advice, verbal and written instruction, once for 30 min (n=66). C: rest and analgesics for 2 weeks and than advice about mobilisation (n=33). Follow‐up at 1 and 2 months.
Outcomes	ROM (goniometer), pain (VAS).
Notes	During study randomisation into C stopped.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear