Skip to main content

Table 3 Determine and compare the validity of self-reported substance use in Rafsanjan Youth Cohort Study and primary health care setting (N = 1007)

From: Validity of self-reported substance use: research setting versus primary health care setting

 

Rafsanjan Youth Cohort Study (research setting)

primary health care setting

compare the validity of self-reported substance use in two settings

Drug/gender

Sensitivity

95% CI

Specificitya

95% CI

Conditional κ

95% CI

Sensitivity

95% CI

Specificitya

95% CI

Conditional κ

95% CI

p-valuec

opioid /total

past 72 h

39.4

(22.9–57.9)

100

(99.4–100)

0.381

(0.376–0.385)

50

(32.4–67.6)

100

(99–100)

0.478

(0.470–0.486)

0.383

past 12 months

57.6

(39.2–74.5)

0.523

(0.522–0.524)

64.7

(46.5–80.3)

0.614

(0.608–0.620)

-d

opioid /men

past 72 h

37.5

(21.1–56.3)

100

(99.2–100)

0.360

(0.353–0.366)

53.3

(34.3–71.7)

100

(98.2–100)

0.498

(0.482–0.515)

0.211

past 12 months

56.3

(37.7–73.6)

0.501

(0.499–0.503)

70

(50.6–85.3)

0.651

(0.640–0.660)

-d

opioid /women

past 72 h

100

(2.5–100)

100

(96.8–100)

1

1

25

(.63–80.6)

100

(97.8–100)

0.246

(0.242–0.250)

0.171

past 12 months

100

(2.5–100)

1

1

25

(.63–80.6)

  

-d

Cannabis/men

past 72 h

10

(.253–44.5)

100

(99.4–100)

0.10

(0.096–0.101)

12.5

(1.55–38.3)

100

(98.3–100)

0.117

(0.105–0.130)

0.846

past 12 months

20

(2.52–55.6)

0.187

(0185–0.189)

12.5

(1.55–38.3)

0.105

(0.094–0.117)

-d

Methadone/total

past 72 h

20

(5.73–43.7)

100

(99.4–100)

0.195

(0.192–0.198)

20.7

(7.99–39.7)

100

(99–100)

0.199

(0.190–0.208)

0.953

past 12 months

40

(19.1–63.9)

0.384

(0.381–.0386)

31

(15.3–50.8)

0.291

(0.283–0.299)

-d

Methadone/men

past 72 h

21.1

(6.05–45.6)

100

(99.2–100)

0.210

(0.199–0.208)

24

(9.36–45.1)

100

(98.2–100)

0.220

(0.202–0.237)

0.817

past 12 months

42.1

(20.3–66.5)

  

0.402

(0.399–0.405)

36

(18–57.5)

0.327706

(0.312–0.343)

-d

Methadone/women

past 72 h

0.000

-b

100

0.00

0.00

100

0.00

past 12 months

0.000

-b

0.00

0.00

0.00

amphetamine and Methamphetamine/men

past 72 h

0.000

-b

100

0.00

0.00

100

0.00

past 12 months

0.000

-b

0.00

0.00

0.00

  1. a Specificity was not calculated for past-12-month use because of the potential for inflated false negatives
  2. b Confidence interval could not be calculated because sensitivity was zero
  3. cChi-Square test: Comparison of self-reported substance use in two settings among urinalysis-confirmed users
  4. dp-value was not calculated to compare of self-reported substance use over the past year, as some people may have correctly self-report of substance use over the past year, but a urine test could not determine substance use over the past year