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Table 3 Summary of hierarchical logistic regression analyses at year one with SCL-90-R caseness as the dependent variable

From: Cognitive impairment as a predictor of long-term psychological distress in patients with polysubstance use disorders: a prospective longitudinal cohort study

Predictor

Model 1

Model 2

Model 3

Wald

p

OR

95% CI

Wald

p

OR

95% CI

Wald

p

OR

95% CI

MoCA®

            

(Constant)

.091

.763

1.0

–

3.882

.049

.6

–

23.251

<.001

.9

–

MoCA®+

5.462

.019

2.5

1.2 – 5.4

3.388

.066

2.2

1.0–4.9

4.068

.044

2.7

1.0–7.0

DUDIT-C

    

14.415

<.001

1.2

1.1–1.3

11.738

<.001

1.2

1.1–1.3

Baseline GSI

        

22.393

<.001

6.4

3.0–13.9

 

χ2 = 5.8, p = .016, R2 = .054 Correctly classified 58.0%

χ2 = 24.0, p =. <.001, R2 = .209

Correctly classified 70.4%

χ2 = 54.0, p = <.001, R2 = .425

Correctly classified 73.9%

WASI FSIQ

            

(Constant)

1.414

.234

1.2

–

2.512

.113

.7

–

19.586

<.001

1.3

–

WASI+

1.311

.252

1.7

.7–4.3

1.144

.285

1.7

.6–4.5

.078

.780

1.2

.4–3.5

DUDIT-C

    

15.385

<.001

1.2

1.1–1.3

13.194

<.001

1.2

1.1–1.3

Baseline GSI

        

19.511

<.001

4.9

2.4–9.8

 

χ2 = 1.4, p = .243, R2 = .013

Correctly classified 57.6%

χ2 = 20.9, p = < .001, R2 = .182

Correctly classified 69.2%

χ2 = 45.6, p = <.001, R2 = .367

Correctly classified 73.4%

BRIEF-A

            

(Constant)

3.123

.077

.6060

–

9.650

.002

.3

–

20.707

<.001

.1

–

BRIEF-A+

13.560

<.001

4.1

1.9–8.6

11.124

< 001

3.9

1.8–8.6

.305

.581

1.3

.5–3.5

DUDIT-C

    

12.663

< 001

1.2

1.1–1,3

10.924

<.001

1.2

1.1–1.3

Baseline GSI

        

14.403

< 001

6.0

2.4–15.1

 

χ2 = 14.3, p = < .001, R2 = .141

Correctly classified 67.4%

χ2 = 29.4, p = <.001, R2 = .275 Correctly classified 71.1%

χ2 = 47.3, p = <.001, R2 = .414 Correctly classified 74.2%

  1. MoCA® Montreal Cognitive Assessment®, WASI Wechsler Abbreviated Scale of Intelligence, BRIEF-A Behavior Rating Inventory of Executive Function – Adult version, DUDIT-C Drug Use Identification Test Consumption Items, Baseline GSI Baseline Symptom Checklist-90-Revised Global Severity Index, Model 1 Cognitive impairment as predictor variable, Model 2 Cognitive impairment + DUDIT-C score as predictor variables, Model 3 Cognitive impairment + DUDIT-C score + baseline SCL-90-R GSI score as predictor variables, OR odds ratio, CI confidence interval, χ2 = Omnibus test of model coefficient, R2 = Nagelkerke R-squared. Significant p values at α = .05 in bold