 Participants: The trial will be conducted on 2550 individuals aged 40 years or older with hypertension systolic BP 140 mm Hg or diastolic BP 90 mm Hg, or on antihypertensive therapy in 30 rural communities of Bangladesh, Pakistan and Sri Lanka. Out of the 2550 individuals, 420 with poorly controlled BP Systolic BP160 mmHg or Diastolic BP100 mmHg will be selected, 14 from each community, to investigate the effect of MCI on results from ambulatory BP monitoring. 