IntroductionMalaysia has the highest number of obese and overweight individuals in South-east Asia. The 2019 National Health & Morbidity survey found 50.1% of Malaysians to be overweight or obese with 30.4% being overweight and 19.7% being obese. This has led to the high rise of the bariatric surgeries demand and needs within the nation.Aim & objectivesTo assess the level of fasting blood sugar (FBS), systolic, diastolic blood pressure, stop BANG score for obstructive sleep apnoea (OSA) and BMI (Body Mass Index) for the patients before and after bariatric surgeries (sleeve/gastric bypass) for a one year follow up period.Material & methodsThe study was conducted among 1000 patients who underwent a single weight reduction surgery (sleeve/gastric bypass) by a single surgeon at the Cengild Medical Centre between January 2019 to January 2020. They were followed up for a one-year period through recording the parameters of fasting blood sugar (FBS), systolic, diastolic blood pressure, stop BANG score for obstructive sleep apnoea (OSA) and BMI (Body Mass Index). Study was conducted using universal sampling including all subjects visited the centre and a written consent was obtained from each participant. Descriptive statistics with mean was used and paired t-test was used for comparison and test the difference. The STOP-BANG acronym stands for: Snoring history, Tired during the day, Observed stop breathing while sleep, High blood pressure, BMI more than 35 kg/m2, Age more than 50 years, Neck circumference more than 40 cm and male Gender.ResultsThe mean age of patients was 38 years old. Mean FBS for the patients one month before the operation was 10.42 mmol/L and 5.84 three months post procedure. The systolic blood pressure one month before the operation and 3 months after was 139.81 mmHg and 123.79 mmHg, while diastolic blood pressure was 86.84 mmHg and 81.07 mmHg respectively. BMI was reduced from 39.69 to 27.99 after one year from the weight reduction operation. All the above parameters showed a significant reduction between one-month pre operation as compared to 3 months and 12 months post operation and that improved the health parameters of the patients significantly.ConclusionThe weight reduction operations showed a significant reduction in the FBS, blood pressure, OSA scores and BMI at 3, 12 months after the operation These patients had better overall health after the significant reduction in these parameters.