Influence of room heating on ambulatory blood pressure in winter: a randomised controlled study

Journal of Epidemiology and Community Health - Tập 67 Số 6 - Trang 484-490 - 2013
Keigo Saeki1, Kenji Obayashi2, Junko Iwamoto3, Yuu Tanaka4, Noriyuki Tanaka5, Shota Takata5, Hiroko Kubo6, Nozomi Okamoto2, Kimiko Tomioka2, Satoko Nezu2, Norio Kurumatani2
1Department of Community Health and Epidemiology, Nara Medical University School of Medicine, 840 Shijocho, Kashiharashi, Nara 634-8521, Japan
2Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan
3Department of Nursing, Tenri Health Care University, Nara, Japan
4Department of Anesthesiology, Nara Medical University School of Medicine, Nara, Japan
5Daiwa House Industry Co., Ltd., Nara, Japan
6Department of Environmental Health, Nara Women's University, Nara, Japan

Tóm tắt

BackgroundPrevious studies have proposed that higher blood pressure (BP) in winter is an important cause of increased mortality from cardiovascular disease during the winter. Some observational and physiological studies have shown that cold exposure increases BP, but evidence from a randomised controlled study assessing the effectiveness of intensive room heating for lowering BP was lacking.ObjectivesThe present study aimed to determine whether intensive room heating in winter decreases ambulatory BP as compared with weak room heating resulting in a 10°C lower target room temperature when sufficient clothing and bedclothes are available.MethodsWe conducted a parallel group, assessor blinded, simple randomised controlled study with 1:1 allocation among 146 healthy participants in Japan from November 2009 to March 2010. Ambulatory BP was measured while the participants stayed in single experimental rooms from 21:00 to 8:00. During the session, participants could adjust the amount of clothing and bedclothes as required. Compared with the weak room heating group (mean temperature±SD: 13.9±3.3°C), systolic morning BP (mean BP 2 h after getting out of bed) of the intensive room heating group (24.2±1.7°C) was significantly lower by 5.8 mm Hg (95% CI 2.4 to 9.3). Sleep-trough morning BP surges (morning BP minus lowest night-time BP) in the intensive room heating group were significantly suppressed to about two thirds of the values in the weak room heating group (14.3 vs 21.9 mm Hg; p<0.01).ConclusionsIntensive room heating decreased morning BP and the morning BP surge in winter.

Từ khóa


Tài liệu tham khảo

Curwen, 1990–1991, Excess winter mortality: a British phenomenon?, Health Trends, 22, 169

10.1093/ije/30.5.1100

10.1136/jech.57.10.784

10.1136/bmj.285.6346.919

10.1161/01.HYP.0000199192.17126.d4

10.1016/S0140-6736(96)12338-2

10.1093/aje/kwn266

10.1093/aje/155.1.80

10.1001/jama.282.6.539

10.1097/HJH.0b013e3281c49da5

10.1016/S0140-6736(07)61538-4

10.1291/hypres.29.581

10.1161/01.CIR.0000056521.67546.AA

10.1038/hr.2010.110

10.1161/HYPERTENSIONAHA.110.157149

10.1161/01.HYP.0000198541.12640.0f

10.1136/jech.32.4.235

Woodhouse, 1993, Seasonal variation of blood pressure and its relationship to ambient temperature in an elderly population, J Hypertens, 11, 1267, 10.1097/00004872-199311000-00015

10.1136/oem.52.11.715

Kristal-Boneh, 1996, Summer-winter variation in 24h ambulatory blood pressure, Blood Press Monit, 1, 87

10.1291/hypres.31.569

Hiramatsu, 1984, Acute effects of cold on blood pressure, renin-angiotensin-aldosterone system, catecholamines and adrenal steroids in man, Clin Exp Pharmacol Physiol, 11, 171, 10.1111/j.1440-1681.1984.tb00254.x

Collins, 1985, Effects of age on body temperature and blood pressure in cold environments, Clin Sci (London), 69, 465, 10.1042/cs0690465

10.1152/japplphysiol.00401.2007

10.1152/japplphysiol.00605.2009

10.1152/ajpregu.00099.2010

10.1136/bmj.282.6259.175

Burton, 1973, Human calorimetry II. The average temperature of the tissues of the body, J Nutr, 9, 261, 10.1093/jn/9.3.261

Oguri, 1985, Development of OSA sleep inventory, Seishin Igaku, 27, 791

10.1152/japplphysiol.00338.2010

10.1136/bmj.1.5847.200

10.1007/BF01686280

Thông tin
Thông tin xuất bản

Journal of Epidemiology and Community Health

Tập 67 Số 6

484-490

Thông tin tác giả