Table 4 Multivariate parameter estimates (β), standard error (SE) and 95% confidence interval (CI) of the measurement variables in the structural equation model

Depression*

Depressive symptoms at wave1

 A1

Had trouble falling asleep or sleeping too much

1.00

 A2

Feeling tired or having little energy

1.15(0.02)***

(1.109 1.191)

 A3

Poor appetite or eating too much

1.21(0.022)***

(1.164 1.254)

 A4

Trouble concentrating on things

1.24(0.021)***

(1.202 1.285)

 A5

Had little interest or pleasure in doing things

1.11(0.019)***

(1.073 1.147)

 A6

Feeling down, depressed or hopeless

1.24(0.021)***

(1.196 1.279)

 A7

feeling down, depressed or hopeless

0.81(0.015)***

(0.778 0.839)

 A8

Been moving or speaking slowly

0.70(0.013)***

(0.672 0.724)

 A9

Had thoughts that respondent would be better off dead

0.31(0.009)***

(0.297 0.332)

Depression**

Depressive symptoms at wave2

 B1

Had trouble falling asleep or sleeping too much

1.00

 B2

Feeling tired or having little energy

1.13(0.024)***

(1.085 1.182)

 B3

Poor appetite or eating too much

1.15(0.026)***

(1.099 1.203)

 B4

Trouble concentrating on things

1.17(0.024)***

(1.117 1.213)

 B5

Had little interest or pleasure in doing things

1.13(0.023)***

(1.087 1.179)

 B6

Feeling down, depressed or hopeless

1.36(0.027)***

(1.301 1.409)

 B7

feeling down, depressed or hopeless

0.97(0.021)***

(0.924 1.007)

 B8

Been moving or speaking slowly

0.79(0.017)***

(0.761 0.829)

 B9

Had thoughts that respondent would be better off dead

0.38(0.011)***

)0.359 0.403)

Model fit statistics

 Chi-Square

0.000

RMSEA

0.045

 CFI

0.889

 TLI

0.870

 SRMR

0.028

 CD

0.426