EFFECT OF THE SEASONAL VARIATION ON BP AMONG HEALTHY INDIVIDUALS AND HYPERTENSIVE INDIVIDUALS

Dr.Gajendra Prasad Gupta; Dr Sanjay Kumar Dubey

Volume : VIII, Issue : V, May - 2019

EFFECT OF THE SEASONAL VARIATION ON BP AMONG HEALTHY INDIVIDUALS AND HYPERTENSIVE INDIVIDUALS

Dr. Gajendra Prasad Gupta, Dr Sanjay Kumar Dubey

Abstract :

Aim: To find out the seasonal variation [between summer and winter] in BP in healthy and hypertensive individuals and to determine whether there is need to change the dose of anti– hypertensive drug/s in patients with change in season . Methods. A total of 200 participants were registered in the study, 100 in each hypertensive and normotensive group out of which 44 were lost to follow up over a period of eighteen months. So the final analysis of data was done for 156 participants (81 hypertensive and 75 normotensive) Results The mean SBP during winter in hypertensive participants was 155.68±16.97 mmHg and that during summer was 135.73±13.46 mmHg. Test of significance showed statistically significant difference in mean BP during winter and summer (p=0.0001).Seasonal variation in mean SBP was 19.95 mmHg and 11.7 mmHg in DBP among 81 HT participants with both SBP and DBP higher in winter as compared to summer. Conclusion Higher outdoor temperature during summer is significantly associated with lower mean BP in hypertensive patients across the age groups. The reduction in BP during higher temperature needed reduction in dose of antihypertensive medications in a few patients. In hypertensive participants, significant association was found between BMI and seasonal variation in SBP and DBP in normal and overweight but no statistical association was found between BMI and SBP / DBP in underweight and obese participants, and no statistical association was found between BMI and systolic and diastolic difference in normotensive group.