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Table 1 Demographic data of the drug users in this study

From: Application of the Chinese version of the addiction profile index (API) in drug users: an analysis of validity and measurement invariance across genders

 

Number of participants (%)/Mean ± SD

Shanxi (n = 487)

Sichuan (n = 625)

Guizhou (n = 482)

Guangdong (n = 508)

Hunan (n = 150)

Total (N = 2252)

Gender

 Male

348 (26.6)

448 (34.2)

141 (10.8)

247 (18.9)

125 (9.5)

1309 (100)

 Female

139 (14.7)

177 (18.8)

341 (36.2)

261 (27.7)

25 (2.7)

943 (100)

Age

    

33.52 ± 8.629

 18–25

60 (13.5)

148 (33.3)

106 (23.9)

111 (25.0)

19 (4.3)

444 (100)

 26–34

200 (23.3)

275 (32.1)

135 (15.8)

189 (22.1)

58 (6.8)

857 (100)

 35–44

173 (26.2)

138 (20.9)

144 (21.8)

160 (24.2)

46 (7.0)

661 (100)

  ≥ 45

54 (18.6)

64 (22.1)

97 (33.4)

48 (16.6)

27 (9.3)

290 (100)

Employment

 Unemployed

195 (18.3)

286 (26.9)

288 (27.0)

221 (20.8)

75 (7.0)

1065 (100)

 Employed

292 (24.6)

339 (28.6)

194 (16.3)

287 (24.2)

75 (6.3)

1187 (100)

Educational level

  ≤ Primary

121 (26.7)

123 (27.1)

79 (17.4)

116 (25.6)

15 (3.3%)

454 (100)

 Middle

233 (19.7)

328 (27.7)

262 (22.1)

289 (24.4)

73 (6.2)

1185 (100)

 High

82 (18.2)

135 (29.9)

101 (22.4)

84 (18.6)

49 (10.9)

451 (100)

  ≥ University

31 (30.7)

31 (30.7)

21 (20.8)

10 (9.9)

8 (7.9)

101 (100)

Categorya

 Opioidsb

180 (17.4)

209 (20.3)

321 (31.1)

266 (25.8)

56 (5.4)

1032 (100)

 Cannabis

33 (14.0)

102 (43.4)

22 (9.4)

60 (25.5)

18 (7.7)

235 (100)

 ATSc

318 (19.6)

538 (33.2)

266 (16.5)

371 (22.9)

129 (8.0)

1622 (100)

 Hallucinogend

76 (15.4)

204 (42.4)

49 (10.2)

111 (23.1)

41 (8.5)

481 (100)

 Pills-Medicinee

84 (52.2)

38 (23.6)

16 (9.9)

17 (10.6)

6 (3.7)

161 (100)

 Othersf

151 (51.0)

55 (18.6)

19 (6.4)

61 (20.6)

10 (3.4)

296 (100)

  1. a: Usage in previous period
  2. b: Opioids = Heroin + Opiates
  3. c: ATS = Amphetamine-type stimulants = Ice + Magu +Ecstasy
  4. d: Hallucinogen = Ketamine
  5. e: Pills-Medicine = Dolantin +Morphine + Rohypnol +Rivotril +Akineton + Tantum
  6. f: Others = GHB + LSD + Crack + Cocaine
  7. Abbreviations: SD standard deviation