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Table 2 Demographic and MMT characteristics between retained and dropout clients at 6- and 12- month follow-up

From: Predictors of continued HIV-risk behaviors among drug users in methadone maintenance therapy program in China—A prospective study

Characteristic 6-month follow-up   12-month follow-up  
Retained Dropped out Retained Dropped out
(n = 3123) (n = 2182) (n = 2061) (n = 3244)
Age (yrs) mean (SD) 38.63(6.15) 38.23(6.10) ** 38.85(6.24) 38.27(6.07) **
Sex n (%)     
 Male 2865 (91.74) 2071 (94.91) *** 1898 (92.09) 3038 (93.65) **
 Female 258 (8.26) 111 (5.09) 163 (7.91) 206 (6.35)
Employment n (%)     
 Employed 1928 (61.74) 1118 (51.24) *** 1287 (62.45) 1759(54.22) ***
 Unemployed 1195 (38.26) 1064 (48.76) 774 (37.55) 1485(45.78)
Marital status n (%)     
 Married 1445 (46.26) 1004 (46.01) 968 (46.97) 1481(45.65) *
 Unmarried 1698 (53.74) 1178(53.99) 1093 (53.03) 1763(54.96)
Education n (%)     
 Primary school 611(19.56) 427(19.57) * 406(19.70) 632(19.48) ***
 Junior school 1923(61.58) 1412(64.71) 1241(60.21) 2094(64.55)
 Senior school or higher 589(18.86) 343(15.72) 414(20.19) 518(15.97)
HIV n (%)     
 Positive 206(6.60) 195(8.94) ** 148(7.18) 253(7.80)
 Negative 2917(93.40) 1987(91.06) 1913(92.82) 2991(92.20)
HCV n (%)     
 Positive 2427(79.73) 1482(76.27) ** 1626(80.34) 2283(77.05) **
 Negative 617(20.27) 461(23.73) 398(19.66) 680(22.95)
Yrs of drug use before MMT 15.22(5.06) 14.74(5.00) ** 15.45(4.88) 14.75(5.12) ***
mean (SD)
Methadone dosage (mg/day) mean (SD) 51.11(22.05) 44.10(18.94) *** 52.38(22.17) 45.59(19.98) ***
Treatment adherence (days), mean (SD) 183.00 36.00 267.00 53.00
(95.00 ~ 183.00) (14.00 ~ 90.00) *** (152.00 ~ 336.00) (18.00 ~ 143.00) ***
Longest duration of abstinence (months) median (IQR) 4.00(2.00 ~ 6.00) 0.00(0.00 ~ 1.00) *** 4.00(2.00 ~ 7.00) 1.00(0.00 ~ 2.75) ***
  1. *p < 0.05, **p < 0.01, ***p < 0.001.