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Table 2 Comparison of Individuals Providing Only Baseline Data and Individuals Providing Complete Data at Baseline and at Six Months' Follow-Up

From: Substance abuse treatment and psychiatric comorbidity: do benefits spill over? analysis of data from a prospective trial among cocaine-dependent homeless persons

Characteristic1 Baseline Only (n = 32) Available at Baseline and 6 months (n = 95) Statistical Test 2 p
Age 38.97 (7.96) 37.65 (7.10) U = 1391.5 0.59
Race (% AA) 71.9 86.3 χ2 = 3.49 0.06
Gender (% male) 68.8 74.7 χ2 = 0.44 0.51
Education 12.93 (3.45) 13.03 (2.02) U = 1465 0.76
Diagnostic Category at Baseline (%)    χ2 (df 3) = 0.08 0.99
ARD Only (%) 9.4 10.5   
MRD Only (%) 28.1 26.3   
Combo (%) 31.3 32.6   
None (%) 31.3 30.5   
Abstinent (%)3 100.0 98.9 χ2 = 0.34 0.56
Anti-social Personality Disorder (%) 28.1 31.6 χ2 = 0.13 0.71
  1. Table Notes
  2. 1. Abbreviations: ARD = anxiety-related disorder; MRD = mood-related disorder; Combo = presence of both ARD and MRD; AA = African American.
  3. 2. Continuous variables are compared with the Mann-Whitney U-Test, and categorical variables are compared with the χ2 test (df = 1 for all comparisons except where noted).
  4. 3. Abstinent (%) refers to abstinence at baseline, by urine test in the first few days after entering treatment