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ORIGINAL RESEARCH ARTICLE

Irregular Patterns in the Daily Weight Chart at Night Predict Body Weight Regain

Misuzu Tanaka^*, Kazue Itoh, Shimako Abe^*, Katsumi Imai^*, Takashi Masuda^*, Ririko Koga^*, Hitomi Itoh^*, Yumiko Konomi, Naoko Kinukawa and Toshiie Sakata^*,1

^* Health Promotion Center, Nakamura-Gakuen University, Fukuoka 814-0198, Japan; Aichi Gakusen University, Aichi 444-8520, Japan; Division of Food and Nutrition, Fukuoka Women’s Junior College, Fukuoka 818-0193, Japan; and Department of Medical Information Science, Kyushu University Hospital, Fukuoka 815-8582, Japan

To whom requests for reprints should be addressed at ¹ Department of Nutritional Sciences, Faculty of Nutritional Sciences, Nakamura-Gakuen University, 5-7-1 Befu, Jounan-Ku, Fukuoka 814-0198, Japan. E-mail: sakata{at}nakamura-u.ac.jp

This study examined whether charting daily weight patterns can predict weight regain in obese patients. The subjects were 98 moderately obese Japanese women aged 23 to 66 years who were obliged to precisely record their daily weights during the initial 4-month education period, but not thereafter. The patients were followed up at 8, 12, and 16 months. Abdominal fat areas and blood samples were assessed in the outpatient clinic at 0, 4, and 16 months. The standard deviations (SDs) of the differences in body weight between ‘‘after waking up’’ and ‘‘after breakfast’’ (SDa), ‘‘after dinner’’ (SDb), and ‘‘before going to bed’’ (SDc) were calculated, which were parameters reflecting the fluctuations in the daily weight patterns during the first 4 months. SDc, but not SDa or SDb, was correlated positively with weight regain at 8, 12, and 16 months (P = 0.049, P = 0.002, and P = 0.001, respectively). There were significant differences in temporal change in body weight and abdominal visceral fat between the small SDc group (SDc 25th percentile) and the large SDc group (SDc >75th percentile), but not for subcutaneous abdominal fat or the serum concentrations of glucose, insulin, or lipids. The results indicate that fluctuation of body weight immediately before going to bed is useful for predicting the rebound in body weight.

Key Words: moderately obese Japanese women • rebound in body weight • charting daily weight pattern • fluctuation of body weight immediately before going to bed