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Table 1 Basic demographic characteristics surveyed patients

From: Attitudes and knowledge about naloxone and overdose prevention among detained drug users in Ningbo, China

  Total Male Female
Number of participants 279 191 (70.0%) 82 (30%)
Age (Mean ± STD) 31.7 ± 7.1 31.3 ± 7.5 32.3 ± 6.2
Ethnicity    
   Han 248 (91.9%) 172 (90.5%) 76 (95.0%)
   Minority 22 (8.1%) 18 (9.5%) 4 (5.0%)
Marital Status    
   Single 130 (48.9%) 92 (49.7%) 38 (46.9%)
   Married 92 (34.6%) 71 (38.4%) 21 (25.9%)
   Divorced 36 (13.5%) 17 (9.2%) 19 (23.5%)
   Separation 2 (0. 8%) 2 (1.1%) 0
Widowed 6 (2.3%) 3 (1.6%) 3 (3.7%)
Education    
   Illiterate 15 (5.7%) 12 (6.5%) 3 (3.7%)
   Elementary school 72 (27.2%) 53 (28.9%) 19 (23.5%)
   High or vocational school 124 (46.8%) 80 (43.5%) 44 (54.3%)
   College 49 (18.5%) 36 (19.6%) 13 (16.0%)
   Graduate school 5 (1.9%) 3 (1.6%) 2 (2.5%)
Route of heroin administration    
   Snorting 13 (5.4%) 8 (4.7%) 5 (7.2%)
   Smoking 140 (58.3%) 107 (62.9%) 33 (47.8%)
   Injecting 55 (22.9%) 34 (20.0%) 20 (29.0%)
   2 or 3 methods 32 (13.3%) 21 (12.4%) 11 (15.9%)
Duration of heroin use (years) 4.82 ± 4.18 4.28 ± 3.67 6.22 ± 5.03