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Table 1 Baseline characteristics according to study group.

From: Comparative effectiveness of lifestyle interventions on cardiovascular risk factors among a Dutch overweight working population: A randomized controlled trial

  Control
(n = 92)
Phone
(n = 91)
Internet
(n = 93)
All
(n = 276)
p-value
Male (%) 70.7 68.1 68.8 69.2 0.930
Age (SD), yrs 43.8 (9.4) 43.2 (9.6) 44.9 (8.5) 44.0 (9.2) 0.410
Body weight (SD), kg 92.3 ( 11.3) 94.4 (15.6) 94.0 (13.7) 93.5 (13.6) 0.540
Height (SD), cm 177.8 (9.0) 177.6 (10.1) 176.7 (8.4) 177.4 (9.2) 0.664
BMI (SD), kg/m2 29.2 (2.7) 29.8 (3.3) 30.0 (3.4) 29.7 (3.1) 0.141
Highly educated (%) 59.8 53.8 57.0 56.9 0.720
Smoking (%≥ 1 unit/day) 16.3 13.2 11.8 13.8 0.664
Medication for comorbidity (%) 15.2 15.4 12.9 14.5 0.907
Cardiovascular risk factors n = 82 n = 86 n = 91 n = 259  
Waist (SD), cm 101.4 (8.9) 102.1 (10.9) 102.6 (9.7) 102.0 (9.9) 0.696
SSK (SD), mm 80.9 (24.1) 88.6 (28.8) 90.5 (29.8) 86.8 (28.0) 0.062
SBP (SD), mmHg 135.9 (15.0) 135.1 (15.3) 135.9 (16.6) 135.6 (15.6) 0.940
DBP (SD), mmHg 87.9 (10.8) 88.4 (9.9) 90.0 (10.0) 88.8 (10.2) 0.345
TC (SD), mmol/la 5.0 (0.8) 4.9 (0.9) 4.9 (0.9) 4.9 (0.8) 0.769
Predicted VO2max (SD), ml/kg/min)b 38.9 (5.6) 37.6 (6.9) 36.7 (6.3) 37.7 (6.4) 0.092
  1. Abbreviations: SD, standard deviation; BMI, body mass index; Waist, waist circumference; SSK, sum of skinfolds; SBP, systolic blood pressure; DBP, diastolic blood pressure; TC, total cholesterol; VO2max, maximal oxygen uptake, a n = 253 (control: n = 79, phone: n = 85, Internet: n = 89), b n = 245 (control: n = 75, phone: n = 83, Internet: n = 87).