Skip to main content

Table 1 Bivariate analyses of factors associated with methadone doses among 158 methadone-treated PWID in Thailand

From: Barriers to retention in methadone maintenance therapy among people who inject drugs in Bangkok, Thailand: a mixed-methods study

Characteristic Total n (%) 158 (100) Methadone dosageb p value Methadone dosageb p value
≥ 60 mg/dayn (%)16 (10.1) < 60 mg/dayn (%)142 (89.9) > 30 mg/dayn (%)78 (49.4) ≤ 30 mg/dayn (%)80 (50.6)
Age (median, IQR) 38 (34–48) 36 (34–44) 38 (34–48) 0.273 37 (33–46) 40 (35–51) 0.027
Male gender 131 (82.9) 13 (81.2) 118 (90.1) 0.739c 65 (83.3) 66 (82.5) 0.889
HIV-positive 30 (19.0) 7 (43.8) 23 (16.2) 0.015c 18 (23.1) 12 (15.0) 0.196
Daily heroin injectiond 22 (13.9) 1 (6.3) 21 (14.8) 0.701c 11 (14.1) 11 (13.8) 0.949
Daily midazolam injectiond 76 (48.1) 8 (50.0) 68 (47.9) 0.873 39 (50.0) 37 (46.3) 0.637
Daily methamphetamine injectiond 7 (4.4) 0 (0.0) 7 (4.9) N/A 4 (5.1) 3 (3.8) 0.718c
Daily methadone injectiond 23 (14.6) 2 (12.5) 21 (14.8) >0.999c 13 (16.7) 10 (12.5) 0.458
Syringe sharingd 30 (19.0) 2 (12.5) 28 (19.7) 0.738c 13 (16.7) 17 (21.3) 0.463
Ever acquired street methadone because prescribed dosages of methadone were too low 25 (15.8) 3 (18.8) 22 (15.5) 0.721c 16 (20.5) 9 (11.3) 0.111
Duration of methadone treatmenta
 < 1 month 4 (2.5) 0 (0.0) 4 (2.8) N/A 1 (1.3) 3 (3.8) N/A
 ≥ 1 month, < 6 months 26 (16.5) 2 (12.5) 24 (16.9)   10 (12.8) 16 (20.0)  
 ≥ 6 months, < 12 months 11 (6.7) 0 (0.0) 11 (7.7)   6 (7.7) 5 (6.3)  
 ≥ 12 month 115 (72.8) 14 (87.5) 101 (71.1)   60 (76.9) 55 (68.8)  
  1. PWID people who inject drugs, IQR interquartile range
  2. aNumbers do not add up to 158 due to missing observations (n = 2)
  3. bAt the most recent time they received methadone
  4. cFisher’s exact test
  5. dRefers to the previous 6 months