Table 2 Hierarchical binary logistic regression predicting the likelihood that a CHR participant is female using sample (CAPR vs NAPLS-3), age, and recruitment source as predictors (N = 820).

From: Shift in sex and age of individuals at a clinical high risk (CHR) for psychosis: relation to differences in recruitment methods and effect on sample characteristics

 

Model

Variables

Model

Step

df

χ2

Predictor

Wald

β

SE (β)

Odds ratio

95% CI for OR

Univariate models

1

1

16.23***

Sample

15.52

0.80***

0.20

2.21

1.49, 3.28

1

1

0.11

Age

0.11

>−0.01

0.02

1.00

0.96, 1.03

1

2

20.03***

Recruitment Source

     
   

Self, internet

14.80

0.81***

0.21

2.25

1.49, 3.41

   

Self, not internet

7.20

0.59**

0.22

1.81

1.17, 2.79

Hierarchical model

1

1

16.23***

      
   

Sample

15.52***

0.80

0.20

2.22

1.49, 3.28

2

2

20.23***

      
   

Sample

19.14***

0.96

0.22

2.60

1.70, 4.00

   

Age

3.96

-0.04

0.02

0.97

0.93, 1.00

3

4

36.53***

      
   

Sample

9.08**

0.71

0.24

2.04

1.28, 3.24

   

Age

10.78**

−0.07

0.02

0.94

0.90, 0.97

   

Self, internet

9.96**

0.79

0.25

2.20

1.35, 3.59

   

Self, not internet

10.14**

0.76

0.24

2.14

1.34, 3.42

4

6

48.73***

      
   

Sample

0.01

−0.03

0.32

0.97

0.52, 1.80

   

Age

14.14***

−0.08

0.02

0.93

0.89, 0.96

   

Self, internet

2.80

0.46

0.28

1.59

0.92, 2.73

   

Self, not internet

0.20

0.14

0.31

1.15

0.63, 2.11

   

Sample × self-internet

7.45**

−1.49

0.55

0.23

0.08, 0.66

   

Sample × self not internet

9.00**

−1.87

0.62

0.16

0.05, 0.52

  1. *p < 0.05, **p < 0.01, ***p < 0.001.
  2. Overall model correctly classified 59% of cases.
  3. Sample was coded −0.5 = NAPLS 3, 0.5 = CAPR; Reference group for recruitment source was other referrals.
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