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Table 1 Selected characteristics of ascertained methamphetamine and heroin male users aged 15–54 years, by year and source, Taoyuan County, Taiwan

From: Prevalence of heroin and methamphetamine male users in the northern Taiwan, 1999–2002: capture-recapture estimates

  

Total

Resident onlya

 

Year

Drug

N

Age

Mean (SD)

N

Age

Mean (SD)

Resident/total %

Prison

1999

Allb

3126

28.6 (7.8)

2547

28.5 (7.7)

81.5

 

MeAc

2860

28.4 (7.8)

2327

28.2 (7.8)

81.4

 

Heroind

399

31.2 (6.6)

330

31.0 (6.6)

82.7

2000

All

2542

28.7 (7.8)

2188

28.5 (7.7)

86.1

 

MeA

2184

28.2 (7.8)

1865

28.0 (7.8)

85.4

 

Heroin

372

31.5 (7.2)

337

31.1 (7.1)

90.6

2001

All

1483

30.1 (8.0)

1299

29.9 (7.9)

87.6

 

MeA

1095

29.3 (8.0)

956

29.1 (7.9)

87.3

 

Heroin

393

32.4 (7.7)

347

32.2 (7.6)

88.3

2002

All

1012

30.9 (7.9)

867

31.0 (7.9)

85.7

 

MeA

624

30.0 (7.8)

532

30.2 (7.8)

85.3

 

Heroin

400

32.4 (7.7)

347

32.3 (7.8)

86.8

Hospital

1999

All

322

30.1 (6.9)

267

30.0 (7.0)

82.9

 

MeA

215

29.2 (6.60

180

29.2 (6.8)

83.7

 

Heroin

124

31.6 (7.1)

104

31.3 (7.0)

83.9

2000

All

404

30.8 (7.3)

352

30.7 (7.5)

87.1

 

MeA

202

29.8 (6.7)

174

29.9 (6.9)

86.1

 

Heroin

216

31.5 (7.8)

192

31.3 (7.9)

88.9

2001

All

460

32.3 (7.3)

389

32.5 (7.4)

84.6

 

MeA

198

30.9 (6.7)

159

31.3 (6.8)

80.3

 

Heroin

265

33.4 (7.7)

233

33.3 (7.7)

87.9

2002

All

702

33.2 (7.5)

598

33.4 (7.5)

85.2

 

MeA

239

31.8 (6.8)

212

31.9 (6.7)

88.7

 

Heroin

507

33.7 (7.7)

424

33.9 (7.7)

83.6

  1. aIndividuals with documented addresses located in Taoyuan County, Taiwan.
  2. bAny case who was involved in the use of either methamphetamine or heroin.
  3. cAny case who was involved in the use of methamphetamine.
  4. dAny case who was involved in the use of heroin.
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