Table 3 Bivariate logistic regression: drug use between retention time points

Cocaine

Odds Ratio

p-value

95% Confidence Interval

One Month Retention

0.658

0.331

0.283–1.529

Three Month Retention

2.696

0.207

0.579–12.564

Six Month Retention¹

-

-

-

Methamphetamine

One Month Retention

0.702

0.474

0.266–1.852

Three Month Retention

1.105

0.879

0.307–3.974

Six Month Retention

0.534

0.580

0.058–4.919

Either Cocaine or Methamphetamine

One Month Retention

0.554

0.112

0.267–1.148

Three Month Retention

0.955

0.936

0.307–2.966

Six Month Retention

0.200

0.131

0.025–1.613