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Longitudinal Changes in Fat Mass and the Hippocampus
Author(s) -
Ambikairajah Ananthan,
TabatabaeiJafari Hossein,
Walsh Erin,
Hornberger Michael,
Cherbuin Nicolas
Publication year - 2020
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.22819
Subject(s) - overweight , waist , medicine , body mass index , obesity , circumference , endocrinology , demography , mathematics , sociology , geometry
Objective This study aimed to investigate cross‐sectional and longitudinal associations between fat mass (i.e., body mass index [BMI], waist circumference [WC], and waist to hip ratio [WTHR]) and hippocampal volumes. Methods UK Biobank participants ( N = 20,395) aged 40 to 70 years (mean follow‐up = 7.66 years), were included and categorized into one of four groups, which represented their baseline fat mass status and trajectory of change by follow‐up assessment: normal weight to overweight/obesity, overweight/obesity to normal weight (ON), normal weight stable (NS), or overweight/obesity stable (OS). Regression models used NS (WC < 80 cm in women and < 94 cm in men; WTHR < 0.85 in women and < 0.90 in men; BMI < 25 kg/m 2 in women and men) as the reference group. Hippocampal volumes were automatically segmented using the FMRIB Software Library. Results Compared with NS, OS (BMI: B = −62.23 [SE = 16.76]; WC: B = −145.56 [SE = 16.97]; WTHR: B = −101.26 [SE = 19.54]) and ON (BMI: B = −61.1 [SE = 30.3]; WC: B = −93.77 [SE = 24.96]; WTHR: B = −69.92 [SE = 26.22]) had significantly lower hippocampal volumes. Conclusions The detrimental effects of overweight/obesity may extend beyond the duration of overweight/obesity itself.