Correction for BMJ 333 (7557) 30.
Correction for Nixon et al., BMJ 332 (7555) 1413.

BMJ  2006;333:339 (12 August), doi:10.1136/bmj.333.7563.339-a

Correction

Correction for Nixon et al

In the correction (BMJ 2006;333:30, 1 Jul) to the article "Randomised, controlled trial of alternating pressure mattresses compared with alternating pressure overlays for the prevention of pressure ulcers: PRESSURE (pressure relieving support surfaces) trial" (BMJ 2006;3321413-5, 17 Jun), we incorrectly referred to haemoglobin levels rather than odds ratios. We should have said: "In table 4 of the full version on bmj.com (table 2 of the abridged version), the odds ratio for haemoglobin levels on admission or preoperatively should be 0.89 (0.82 to 0.97), and the corresponding P value should be 0.01."


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