Contrary to recent reports, resting core temperature is not elevated in patients with relapsing-remitting multiple sclerosis (RRMS) compared to healthy controls when measured using precision thermometry, according to a recent study. Furthermore, no association was observed between resting rectal temperature ( Tre) and any subjective measures of fatigue in a subset of participants with MS. Across 2 international data collection sites (Sydney and Dallas), 28 RRMS patients and 27 aged-matched controls (CON) were exposed to either 30°C, 30% relative humidity (RH) (Sydney) or 25°C, 30% RH (Dallas). Resting Tre and esophageal ( Teso) temperature and resting oxygen consumption (VO 2) was measured in MS (n=28) and CON (n=27) groups who completed the 25°C and 30°C trials. Tympanic membrane ( Ttym) temperature was measured in MS (n=16) and CON (n=15) groups in the 30°C condition. A modified fatigue impact scale (MFIS) questionnaire was used to assess subjective measures of psychosocial, physical, and cognitive fatigue in the 30°C condition. Researchers found:
- Irrespective of ambient temperature, no group differences were observed for Tre, Teso, or resting VO 2.
- Similarly, no group differences were observed for Ttym in the 30°C condition.
Chaseling GK, Allen DR, Vucic S, et al. Core temperature is not elevated at rest in people with relapsing-remitting multiple sclerosis. [Published online ahead of print January 3, 2019]. Mult Scler Relat Disord . doi:10.1016/j.msard.2019.01.013.