Eyes on Evidence: August update

 Sleep apnoea may be an independent risk factor for deep vein thrombosis (DVT) but further research is required to confirm this.
Pharmacological thromboprophylaxis when used in addition to compression stockings does not reduce death rates, when compared with compression stockings alone. However, prophylaxis is still useful in reducing venous thromboembolism, unless there is a high risk of bleeding.

Risk of venous thromboembolism with non-oral hormonal contraception

An observational study suggests that women using the transdermal contraceptive patch or combined hormonal vaginal ring appear to have about twice the risk of venous thromboembolism compared with women using combined oral contraceptives containing levonorgestrel.

Dehydration in hospital-admitted stroke patients

Focusing on interventions to reduce the frequency and duration of dehydration have the potential to improve patient outcomes after stroke.

Long-term effects on renal function of tight glycaemic control in early type 1 diabetes

Long-term observational follow up of the Diabetes Control and Complications Trial shows that early tight control of blood glucose is associated with a lower risk of impaired renal function, but could not a detect a difference in the risk of severe renal impairment or end stage disease.
Evidence Updates

In the past month NICE has published online via NHS Evidence an Evidence Update on nocturnal enuresis.