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Table 2 Work performance per month of imprisonment

From: Fifteen years of heroin-assisted treatment in a Swiss prison—a retrospective cohort study

  Total Non-HAT HATa Missing, N (%) pb pBonfc
N (%) 1885 (100) 1788 (94.9) 97 (5.2) 0 (0) n.a.  
Salary [Swiss francs], median (IQR, min–max) 33.5 (13.28, 0.0–578.3) 33.0 (13.36, 0.0–578.3) 36.6 (12.04, 0.0–72.2) 3 (0.13) 0.001 0.005
N work days N (%) N (%) N (%) 3 (0.13) 0.0005 0.0025
 0 170 (9.0) 165 (9.2) 5 (5.2)    
 1–4 57 (3.0) 47 (2.6) 10 (10.3)    
 5–9 137 (7.3) 118 (6.6) 19 (19.6)    
 10–14 196 (10.4) 186 (10.4) 10 (10.3)    
 15–19 715 (38.0) 685 (38.4) 30 (30.9)    
 20–24 562 (29.9) 539 (30.2) 23 (23.7)    
 25+ 45 (2.4) 45 (2.5) 0 (0.0)    
N sick days N (%) N (%) N (%) 3 (0.13) 0.0005 0.0025
 0 1403 (74.6) 1354 (75.9) 49 (50.5)    
 1–4 316 (16.8) 285 (16.0) 31 (32.0)    
 5–9 86 (4.6) 76 (4.3) 10 (10.3)    
 10–14 38 (2.0) 33 (1.9) 5 (5.2)    
 15–19 29 (1.5) 27 (1.5) 2 (2.1)    
 20+ 10 (0.5) 10 (0.6) 0 (0.0)    
N weekend days at work N (%) N (%) N (%) 3 (0.13) 0.03 0.15
 0 1521 (80.8) 1437 (80.5) 84 (86.6)    
 1–4 207 (11.0) 195 (10.9) 12 (12.4)    
 5+ 154 (8.2) 153 (8.6) 1 (1.0)    
N days barn work N (%) N (%) N (%) 3 (0.13) 0.001 0.005
 0 1628 (86.5) 1556 (87.2) 72 (74.2)    
 1–4 44 (2.3) 37 (2.1) 7 (7.2)    
 5–9 37 (2.0) 34 (1.9) 3 (3.1)    
 10–14 31 (1.6) 30 (1.7) 1 (1.0)    
 15–19 61 (3.2) 54 (3.0) 7 (7.2)    
 20+ 81 (4.3) 74 (4.2) 7 (7.2)    
  1. HAT heroin-assisted treatment, IQR interquartile range, max maximum, min minimum, N number
  2. aIncludes heroin with or without other substituents (46.4% persons with methadone and 4.1% with morphine or buprenorphine)
  3. bKruskal-Wallis test for salary, otherwise chi-squared test
  4. cBonferroni-corrected p values