Qualitative criteriaQuantitative criteria
(1) Correctness of diagnosisThree separate blood pressure readings on different occasions taken before initiation of treatment. Hypertension was defined as >160/90 mm Hg
(2)Documentation in patient case notesRecording in case notes of body mass index and total cholesterol concentration
(3) Achievement of blood pressure controlReduction of blood pressure to <160/90 mm Hg
(4) Minimisation of metabolic derangement during treatmentRecording in case notes of plasma urea and electrolyte concentrations