Table 1.

Inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
1. All neurosurgical patients with brain tumour receiving high-dose dexamethasone (more than 4 mg/day) for 10 days or more 2. Age range 18–90 years 3. Pre-diabetes, or without history of diabetes	1. Known diabetes on any treatment 2. HbA1c > 6% 3. Pregnancy 4. Palliative care 5. Unable to give consent 6. Previously on high-dose steroid treatment