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Table 1 Objectively defined circadian phenotype and interdaily stability distribution

From: Weight loss in conservative treatment of obesity in women is associated with physical activity and circadian phenotype: a longitudinal observational study

  n Acrophase BMI at begining (kg/m2) dBMI (kg/m2) Age Mesor (diff. the first and last 14 days) IS Social jet-lag Chronotype
  10 Late phenotype 34.4 ± 10.4 0.2 ± 0.8 27.6 ± 6.0 −42.2 ± 144.2 0.5 ± 0.1 1.5 ± 1.1 44.9 ± 10.1
48 Middle phenotype 34.9 ± 6.1 −1.1 ± 1.4 36.9 ± 7.9 − 15.4 ± 77.0 0.6 ± 0.1 1.3 ± 0.8 52.8 ± 7.2
17 Early phenotype 32.8 ± 6.5 − 0.7 ± 1.8 40.7 ± 7.0 2.3 ± 72.0 0.6 ± 0.1 1.3 ± 1.0 59.8 ± 6.7
Total 75   34.3 ± 6.8 − 0.8 ± 1.5 36.5 ± 8.3 − 14.9 ± 87.1 0.6 ± 0.1 1.3 ± 0.9 53.4 ± 8.6
   sig. & type of test p = 0.560 (F = 0.585) p = 0.049 (F = 3.146) p < 0.001 (F = 9.629) p = 0.749 (χ2 = 0.578) p = 0.624 F = 0.475) p = 0.657 (F = 0.422) p < 0.001 (F = 10.747)
n IS BMI at begining (kg/m2) dBMI (kg/m2) Age Mesor (diff. The first and last 14 days) Acrophase Social jet-lag Chronotype
33 Stable 33.9 ± 5.5 −0.6 ± 1.3 37.7 ± 7.6 9.9 ± 69.6 14.6 ± 0.9 1.0 ± 0.9 53.9 ± 8.1
34 Slighty unstable 34.5 ± 6.9 −1.1 ± 1.7 36.1 ± 9.3 −27.5 ± 94.6 14.6 ± 1.0 1.6 ± 0.8 53.8 ± 9.0
8 Unstable 35.6 ± 11.3 − 0.5 ± 1.3 33.0 ± 6.0 −64.4 ± 96.9 15.3 ± 1.1 1.7 ± 0.9 49.0 ± 9.0
Total 75   34.3 ± 6.8 − 0.8 ± 1.5 36.5 ± 8.3 − 14.9 ± 87.1 14.7 ± 1.0 1.3 ± 0.9 53.4 ± 8.6
   sig. & type of test p = 0.821 (F = 0.198) p = 0.533 (χ2 = 1.260) p = 0.348 (F = 1.072) p = 0.106 (F = 2.321) p = 0.382 (F = 0.977) p = 0.066 (F = 2.828) p = 0.405 (F = 0.916)
  1. Circadian phenotype (CP) distribution (based on the acrophase) and mean BMI at the beginning of the treatment, the mean dBMI (change of BMI during actigraphy measurement), mean age, chronotype and social jet-lag, mean mesor difference between the first and last 14 days of measurement, means intradaily stability (IS) from the whole measurement period. The late phenotype is the most likely to gain weight (mean 0.2 kg/m2), while the middle phenotype lost weight of 1.1 kg/m2 on average and the early phenotype lost weight of 0.7 kg/m2 on average. A significant relationship was found between acrophase and change in BMI (dBMI) (F = 3.146, p = 0.049) and between acrophase and age (F = 9.629, p < 0.001). Participants were divided according to the stability of their circadian rhythm (IS) and the respective means of the same variables. Statistical analyses showed that there was no significant relationship between dBMI and IS (χ2 = 1.260, p = 0.533). At the same time, the link between acrophase and chronotype was confirmed