Table 1 Baseline characteristics of the study participants.

From: Rice bran extract supplement improves sleep efficiency and sleep onset in adults with sleep disturbance: A randomized, double-blind, placebo-controlled, polysomnographic study

  Placebo
(n = 25)
RBS
(n = 25)
P valuea
Age (years) 46.0 ± 14.0 41.8 ± 13.5 0.272
Sex (male/female) 7/18 11/14 0.239
Weight (kg) 62.2 ± 10.3 64.0 ± 11.5 0.560
BMI (kg/m2) 23.2 ± 3.5 23.0 ± 3.0 0.790
BMI  < 25 kg/m2, (n, %) 16 (64) 18 (72) 0.544
BMI  ≥ 25 kg/m2, (n, %) 9 (36) 7 (28)  
SBP (mmHg) 123.2 ± 19.7 118.0 ± 15.0 0.302
DBP (mmHg) 80.1 ± 10.2 76.4 ± 9.7 0.197
Caffeine intake (mg/day) 78.3 ± 53.9 128.5 ± 107.6 0.045
  1. Data are expressed as the mean ± standard deviation or number.
  2. aIndependent t-tests or Chi-squared tests were used to determine significant differences between the groups.
  3. DBP: diastolic blood pressure; SBP: systolic blood pressure.