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Table 4 DIF ordinal logistic regression results (Group 2, n = 337)

From: Validity of single item responses to short message service texts to monitor depression: an mHealth sub-study of the UK ACUDep trial

Predictor

Odds ratio

SE

95 % CI

p

Age DIF analysis

    

 Age

0.98

0.009

0.96, 1.00

.031

 Age x PHQ-9A

1.00

0.002

1.00, 1.01

.271

 PHQ-9A

1.46

0.044

1.38, 1.55

<.001

Gender DIF analysis

    

 Gender (being female)

1.26

0.280

0.81, 1.95

.302

 Gender x PHQ-9A

1.07

0.061

0.95, 1.19

.250

 PHQ-9A

1.39

0.073

1.25, 1.54

<.001

  1. PHQ-9A = Sum of affective PHQ-9 items (Items 1,2,6,7,8,9)