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Table 3 Means and standard deviations at baseline, and at 12-month and 24-month follow-up

From: The effect of an organizational level participatory intervention in secondary vocational education on work-related health outcomes: results of a controlled trial

  Intervention Group Control group p-valueb
n mean (SDa) n mean (SDa)
Primary outcomes
 Need for recovery (0–100)
  Baseline 204 41.7 (33.6) 152 31.5 (30.7) 0.00*
  12 months 112 47.5 (32.4) 92 36.1 (31.4)
  24 months 101 45.2 (33.5) 94 43.0 (33.0)
 Vitality (0–6)
  Baseline 204 4.2 (1.3) 152 4.5 (1.1) 0.00*
  12 months 113 4.0 (1.3) 92 4.5 (0.9)
  24 months 101 4.1 (1.2) 95 4.3 (1.0)
Secondary outcomes
 Psychological demands (4–16)
  Baseline 204 14.3 (2.2) 152 13.6 (2.0) 0.00*
  12 months 114 14.2 (2.0) 96 13.6 (1.9)
  24 months 101 14.3 (2.5) 95 14.3 (1.9)
 Decision authority (3–12)
  Baseline 204 8.4 (1.4) 152 8.9 (1.5) 0.00*
  12 months 114 8.0 (1.4) 96 8.7 (1.5)
  24 months 101 8.3 (1.5) 95 8.8 (1.4)
 Developmental possibilities (4–20)
  Baseline 204 13.3 (2.7) 152 14.1 (2.9) 0.00*
  12 months 114 13.4 (2.6) 96 14.1 (2.6)
  24 months 101 13.6 (2.9) 95 14.2 (2.5)
 Social support colleagues (3–12)
  Baseline 204 9.3 (1.1) 152 9.3 (1.1) 0.96
  12 months 111 9.0 (1.0) 91 9.1 (0.9)
  24 months 101 9.0 (0.8) 94 9.3 (1.1)
 Social support supervisor (3–12)
  Baseline 204 8.2 (1.5) 152 8.1 (1.7) 0.99
  12 months 111 7.7 (1.6) 91 7.9 (1.6)
  24 months 101 7.9 (1.7) 94 7.6 (1.9)
 Social support management (3–12)
  Baseline 204 7.2 (1.7) 152 7.6 (1.6) 0.02*
  12 months 111 6.8 (1.6) 91 7.2 (1.8)
  24 months 101 6.8 (2.0) 94 7.3 (1.8)
 Work ability (2–20)
  Baseline 204 15.3 (2.7) 152 15.9 (2.0) 0.02*
  12 months 108 15.4 (2.3) 91 16.1 (2.1)
  24 months 99 15.3 (2.3) 91 15.4 (2.1)
 Job satisfaction (1–5)
  Baseline 204 3.3 (0.8) 152 3.7 (0.7) 0.00*
  12 months 107 3.5 (0.7) 90 3.8 (0.7)
  24 months 99 3.3 (0.8) 91 3.6 (0.7)
 Commitment (1–5)
  Baseline 204 3.6 (.5) 152 3.8 (0.5) 0.00*
  12 months 111 3.6 (.5) 90 3.8 (0.6)
  24 months 101 3.4 (.7) 94 3.8 (0.5)
 Work engagement (0–6)
  Baseline 204 4.0 (1.2) 152 4.3 (1.0) 0.00*
  12 months 113 3.9 (1.2) 92 4.4 (0.9)
  24 months 101 3.9 (1.2) 95 4.2 (1.0)
 Dedication
  Baseline 204 4.1 (1.3) 152 4.6 (1.1) 0.00*
  12 months 113 4.1 (1.3) 92 4.6 (0.9)
  24 months 101 4.1 (1.4) 95 4.5 (1.0)
 Absorption
  Baseline 204 3.7 (1.4) 152 3.9 (1.2) 0.00*
  12 months 113 3.7 (1.4) 92 4.0 (1.1)
  24 months 101 3.6 (1.4) 95 3.9 (1.1)
 Occupational self-efficacy (5–30)
  Baseline 204 23.5 (3.2) 152 23.9 (2.7) 0.02*
  12 months 113 22.5 (3.0) 92 22.8 (3.1)
  24 months 101 23.0 (3.4) 95 22.9 (2.9)
 Organizational efficacyb (7–35)
  12 months 111 19.8 (4.8) 91 22.1 (4.6)  
  24 months 101 19.7 (4.8) 94 22.0 (4.9)
  1. * p-value < 0.05
  2. aSD is standard deviation
  3. bAll variables are tested with a regression analysis corrected for school
  4. cNot measured at baseline