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Table 3 The freely estimated (A) and the constrained (B) longitudinal measurement models for each measure (N = 934)

From: Addressing challenges of validity and internal consistency of mental health measures in a 27- year longitudinal cohort study – the Northern Swedish Cohort study

Scale

Model

χ 2

Df

p

CFI

RMSEA

90 % CI for RMSEA

Range of factor loadings

Comparison

χ2

∆df

P

Anxiety symptoms T1–T4

A

262.42

136

<0.001

.99

.03

.03–.04

.68–.96

    
 

B

270.60

148

<0.001

.99

.03

.02–.04

.73–.95

A vs. B

21.41

12

.045

Depressive symptoms T1–T4

A

264.95

210

.006

.99

.02

.01–.02

.41–.91

    
 

B

290.00

225

.002

.99

.02

.01–.02

.50–.90

A vs. B

24.94

15

.051

FSS T1–T4

A

974.82

674

<0.001

.97

.02

.02–.03

.42–.78

    
 

B

978.29

701

<0.001

.97

.02

.02–.02

.46–.77

A vs. B

38.24

27

.074

GHQ6-n T1–T4

A

783.86

212

<0.001

.98

.05

.05–.06

.61–.97

    
 

B

753.92

227

<0.001

.98

.05

.05–.05

.62–.97

A vs. B

24.43

15

.058

GHQ6-p T1–T4

A

429.71

210

<0.001

.98

.03

.03–.04

.44–.84

    
 

B

480.69

225

<0.001

.97

.04

.03–.04

.53–.84

A vs. B

55.54

15

.000