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Table 1 Participant characteristics by study visits at two timepoints and by injection statusa

From: Reducing injection intensity is associated with decreased risk for invasive bacterial infection among high-frequency injection drug users

Characteristics Study visits
Demographic Time 0
No. of visits, %
Time 1
No. of visits, %
High intensity injector, (n = 12,469) 100 Cessation, (n = 1680) 13.47 Reduced intensity, (n = 3185) 25.54 High intensity, (n = 7604) 60.98
Gender
 Male (9006) 72.23 13.30 26.49 60.20
 Female (3463) 27.77 13.92 23.07 63.01
Race
 African-American (11,797) 94.63 13.60 32.44 53.96
 White/Hispanic (669) 5.37 13.47 25.16 61.37
Education
 High school or more (4957) 39.85 13.70 26.81 59.49
 Less than high school (7481) 60.15 13.31 24.66 62.02
Marital status
 Married (4077) 32.75 13.56 26.44 60.00
 Never married (8373) 67.25 13.42 25.08 61.50
Homelessb
 No (9392) 79.22 13.13 25.55 61.32
 Yes (2463) 20.78 15.87 25.90 58.22
Employmentb
 No (8846) 83.89 14.24 24.75 61.01
 Yes (1699) 16.11 14.42 25.13 60.45
Behavioral
 Any non-IV drug useb
  No (5991) 48.16 14.54 23.80 61.66
  Yes (6448) 51.84 12.55 27.16 60.30
 Types of drugb
  Heroin (11,631) 93.66 11.59 23.55 58.53
  Cocaine (11,044) 88.94 11.93 25.94 62.13
  Marijuana (3885) 31.17 10.14 27.54 62.32
 Cigarette smokingb
  No (900) 7.24 19.78 29.22 51.00
  < 2 packs/day (10,153) 81.63 13.27 25.89 60.84
  ≥ 2 packs/day (1385) 11.14 10.69 20.43 68.88
 Alcohol useb
  No (3246) 26.15 19.75 23.17 57.09
  Drank > 1 day/week (6490) 52.29 11.54 28.12 60.34
  Drank 7 days/week (2675) 21.55 10.65 22.21 67.14
Clinical
 HIV status
  Negative (8265) 67.31 12.96 24.68 62.36
  Positive (4014) 32.69 14.49 27.24 58.28
 CD4 counts (per mm3)c
  ≥ 500 (1306) 32.54 14.32 25.57 60.11
  200–499 (1857) 46.26 14.11 27.84 58.05
  ≤ 200 (851) 21.20 15.75 28.44 55.82
  1. aData are number (%) of study visits
  2. bCharacteristics in previous 6 months
  3. creflects characteristics among HIV-positive individuals only