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Table 3 Baseline demographic and socio-economic characteristics of participants, overall and by study arm

From: Study design and baseline characteristics of a combined educational and environmental intervention trial to lower sodium intake in Swiss employees

   All Intervention group Control group
Number participants N 141 128 13
 Women n (%) 70 (49.6%) 65 (50.8%) 5 (38.5%)
 Men n (%) 71 (50.4%) 63 (49.2%) 8 (61.5%)
Age (years) Median (range) 46 (21–61) 46 (21–61) 48 (30–59)
  Mean (95% CI) 44.6 (42.8, 46.4) 44.1 (42.2, 46) 49.3 (44.6, 54)
 15–34 n (%) 32 (22.7%) 31 (24.2%) 1 (7.7%)
 35–44 n (%) 24 (17.0%) 23 (18.0%) 1 (7.7%)
 45–54 n (%) 53 (37.6%) 45 (35.2%) 8 (61.5%)
 55–65 n (%) 32 (22.7%) 29 (22.7%) 3 (23.1%)
Nationality
 Swiss n (%) 119 (84.4%) 107 (83.6%) 12 (92.3%)
 Non-Swiss n (%) 22 (15.6%) 21 (16.4%) 1 (7.7%)
Household size Median (range) 3 (1–6) 3 (1–6) 3 (1–6)
  Mean (95% CI) 2.6 (2.4, 2.8) 2.5 (2.4, 2.7) 2.8 (2, 3.7)
Household type (or structure)
 Single n (%) 23 (16.3%) 21 (16.4%) 2 (15.4%)
 Single or couple with children n (%) 65 (46.1%) 58 (45.3%) 7 (53.8%)
 Two or more adults no children n (%) 53 (37.6%) 49 (38.3%) 4 (30.8%)
Education
 Primary/obligatory n (%) 2 (1.4%) 2 (1.6%) 0 (0.0%)
 Secondary n (%) 35 (24.8%) 34 (26.6%) 1 (7.7%)
 Tertiary n (%) 104 (73.8%) 92 (71.9%) 12 (92.3%)
Working position
 Trainee n (%) 3 (2.1%) 3 (2.3%) 0 (0.0%)
 White and blue collar workers n (%) 61 (43.3%) 52 (40.6%) 9 (69.2%)
 Lower and middle management n (%) 67 (47.5%) 63 (49.2%) 4 (30.8%)
 Top management n (%) 10 (7.1%) 10 (7.8%) 0 (0.0%)
Worktime equivalent (% Full Time Equivalent FTE) Median (range) 100 (40–100) 100 (40–100) 90 (60–100)
  Mean (95% CI) 90.4 (88.1, 92.7) 90.8 (88.4, 93.3) 86.5 (78.8, 94.3)
Eating lunch at staff restaurant (times/week)
 0–1 times/week n (%) 30 (21.3%) 30 (23.4%) 0 (0.0%)
 2–3 times/week n (%) 70 (49.6%) 64 (50.0%) 6 (46.2%)
 4–7 times/week n (%) 41 (29.1%) 34 (26.6%) 7 (53.8%)