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Table 2 Prevalence of drug use by point-of-care urine drug screen (UDS) and Computer-Assisted Self Interview (CASI) among 225 HIV-infected patients in middle Tennessee, USA (%)

From: Current drug use and lack of HIV virologic suppression: point-of-care urine drug screen versus self-report

Drug

UDS proportion (95% CI)*

CASI

Past 7 days

Past 6 months

Lifetime

Any drugs

53.5 (47.0-60.0)

42.0‡

59.3

92.4

Marijuana

36.0 (29.7-42.3)

28.6‡

44.1

85.0

Cocaine

25.8 (20.1-31.5)

18.9‡

29.5

66.8

Opiates

7.6 (4.1-10.1)

7.5

18.5

43.8

Meth/amphetamine

2.2 (0.3-4.1)

1.8

6.2

25.2

Injection

N/A

0.4

1.8

23.7

  1. Note: CI: confidence interval; N/A: not applicable.
  2. *95% CI was calculated in order to assess whether or not the CASI point estimate was likely to be within 95% CI of the UDS estimate.
  3. ‡The prevalence of 7-day drug use by CASI is less than the lower bound of 95% CI of the prevalence by UDS.
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BMC Infectious Diseases

ISSN: 1471-2334

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