Repositioning is an integral component of pressure ulcer prevention and treatment; it has a sound theoretical rationale, and is widely
recommended and used in practice. The lack of robust evaluations of repositioning frequency and position for pressure ulcer prevention
mean that great uncertainty remains but it does not mean these interventions are ineffective since all comparisons are grossly underpowered.
Current evidence is small in volume and at risk of bias and there is currently no strong evidence of a reduction in pressure
ulcers with the 30° tilt compared with the standard 90º position or good evidence of an effect of repositioning frequency. There is a
clear need for high-quality, adequately-powered trials to assess the effects of position and optimal frequency of repositioning on pressure
ulcer incidence.
The limited data derived from one economic evaluation means it remains unclear whether repositioning every 3 hours using the 30º
tilt is less costly in terms of nursing time and more effective than standard care involving repositioning every 6 hours using a 90º tilt.