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Table 1 Baseline characteristics of the participants according to categories of self-weighing frequency

From: Self-weighing frequency and the incidence of type 2 diabetes: post hoc analysis of a cluster-randomized controlled trial

Variables Reference Low frequency (< 2 times/week) Middle frequency (2–4 times/week) High frequency (5–7 times/week) P value
Number (%)
 Intervention arm 289 (23.3%) 285 (23.0%) 281 (22.7%) 385 (31.0%)
 Control arm 257 (18.8%) 412 (30.1%) 340 (24.9%) 358 (26.2%)
Age, years
 Intervention arm 49.9 (8.4) 46.8 (7.8) 48.3 (7.3) 50.1 (7.4) 0.263
 Control arm 49.7 (7.5) 47.7 (8.1) 48.4 (7.0) 50.1 (7.1) 0.112
Male,  %
 Intervention arm 67.1% 86.3% 89.0% 86.5% < 0.001
 Control arm 77.8% 86.4% 85.0% 85.2% 0.063
BMI, kg/m2
 Intervention arm 24.7 ± 3.6 24.4 ± 3.2 24.5 ± 3.0 24.1 ± 2.9 0.092
 Control arm 24.7 ± 3.3 24.3 ± 3.0 24.2 ± 3.3 23.9 ± 2.8 0.002
Fasting plasma glucose, mmol/L
 Intervention arm 5.92 ± 0.34 5.92 ± 0.35 5.89 ± 0.33 5.90 ± 0.31 0.988
 Control arm 5.90 ± 0.31 5.90 ± 0.33 5.91 ± 0.33 5.89 ± 0.30 0.568
The phone call participation rate,  %
 Intervention arm 61.6% 86.6% 92.7% 97.5% < 0.001
 Control arm
  1. Values are number (%) or the mean (standard deviation). P values using the Cochran–Armitage test or Jonckheere-Terpstra test