Normal body temperature is 36.6°C (97.9°F) even in France, but can be up to 37°C sometimes or in some places. Temperature of 37.7°C is symptom of sickness. htt

Normal body temperature is 36.6°C (97.9°F) even in France, but can be up to 37°C sometimes or in some places. Temperature of 37.7°C is symptom of sickness. https://www.bmj.com/content/359/bmj.j5468 https://www.bmj.com/content/359/bmj.j5468 Results: In a diverse cohort of 35 488 patients (mean age 52.9 years, 64% women, 41% non-white race) with 243 506 temperature measurements, mean temperature was 36.6°C (95% range 35.7-37.3°C, 99% range 35.3-37.7°C). Several demographic factors were linked to individual level temperature, with older people the coolest (–0.021°C for every decade, P<0.001) and African-American women the hottest (versus white men: 0.052°C, P<0.001). Several comorbidities were linked to lower temperature (eg, hypothyroidism: –0.013°C, P=0.01) or higher temperature (eg, cancer: 0.020, P<0.001), as were physiological measurements (eg, body mass index: 0.002 per m/kg2, P<0.001). Overall, measured factors collectively explained only 8.2% of individual temperature variation. Despite this, unexplained temperature variation was a significant predictor of subsequent mortality: controlling for all measured factors, an increase of 0.149°C (1 SD of individual temperature in the data) was linked to 8.4% higher one year mortality (P=0.014).