Effects of “plate model” as a part of dietary intervention for rehabilitation following myocardial infarction: a randomized controlled trial

Ranil Jayawardena, Piumika Sooriyaarachchi, Pavani Punchihewa, Niroshan Lokunarangoda, Anidu Kirthi Pathirana


Background: Reducing body weight by nutritional management is an integral element of cardiac rehabilitation and in secondary prevention of cardiovascular diseases. Administration of a “plate model” is one practical aspect to control calorie intake. The study aimed to evaluate the effectiveness of the plate model as a part of dietary modification in losing excess weight in post-myocardial infarction (MI) patients.
Methods: An interventional, randomized, single-blinded study with parallel subject allocation was conducted among patients with a history of troponin-positive acute coronary syndrome (ACS). A total of 120 patients were recruited to intervention and control groups. The Intervention cluster was provided with ‘plate model’ and both groups received standard cardiac rehabilitation care. Anthropometric, clinical and metabolic parameters were measured at recruitment and repeated during 4th and 12th week.
Results: A sample of 79 patients (the intervention group: 40, the control group: 39) completed the study. At the end of 12 weeks participants in the intervention group exhibited a significant weight loss (−1.27±3.58 vs. –0.26±2.42 kg; P=0.029) and a significant reduction in BMI (−0.48±1.31 vs. −0.10±0.89 kg/m2; P=0.023). Overweight and obese patients (BMI >23 kg/m2) displayed greater weight loss (−2.13±3.46 vs. 0.12±2.62 kg; P=0.013). Many of overweight and obese patients in the test group (35.7%) experienced a weight loss ≥5% compared to the control group (13.04%) which was a nearly significant result (P=0.065). No significant changes observed in other metabolic parameters.
Conclusions: Plate model is an effective dietary intervention in view of weight reduction in post-MI patients.