Effect of climate on blood pressure of patients with NIDDM in Bandaabbas and Mashad city

Environmental factor affect blood pressure by many mechanisms. Seasonal variation in Essential Hypertension showed that in winter blood pressure increase, especially in old or low weight people. This study designed to evaluate the effect of temperature and climate in blood pressure of Non Insulin Dependent Diabetic patient. Patients and This study is a Historical prospective study of NIDDM patients, sample size was estimated 100 patients. Study performed in three phase with a standardized method. First systolic and diastolic pressure measured in summer and winter in Bandarabbas City that has warm and humid weather most of the time of year. In Second phase mean of systolic and diastolic pressure compared of patient in Bandarabbas compared to these pressure in Mashad City as a cold and dry city. In Third phase, comparison such as second phase was performed only in heprtensive patient. Statistical analysis: Student T test, F statistics, Kruskal Wallis, Paired t test, By EPIINFO software. First phase- 29 patients were evaluated in this phase, and it showed that there is not any difference in systolic and diastolic pressure of two cold and warm season in the first city (Bandar Abbas). Second Phase: 398 patients in I3andar and 102 patients in Mashad city were entered in the second phase. Mean systolic pressure was 126+ /-21 and 133+ /-27.9 mmHg respectively and mean diastolic pressure was 74.6+ /-9.8 and 78.7+ /-14.5 mmHg. Statistical analysis showed significant difference for both systolic and diastolic pressure (p=0.004 and p= 0.0008 respectively). Third phase: Again as like as second phase Statistical analysis showed significant difference for BandarAbbas and Mashad city in both systolic and diastolic pressure of hypertensive patients (p=0.05 and p=0.005 respectively). In Bandar Abbas city there is not any alteration in blood pressure of cold and warm season (may be because of mild and transient change in weather of two season) but in analysis for cold city of Mashad and warm city of Bandar Abbas there was significant difference in blood pressure of both general population and hypertensive diabetic patients.