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. 2019 May 6;9(5):e026129. doi: 10.1136/bmjopen-2018-026129

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Four factors with second-order single common factor model of CES-D (Sheehan’s item allocation, uncorrelated error terms). Rectangles represent indicator items; ovals represent latent factors; single-headed arrows along with standardised weights represent factor and item loadings; circles represent error terms for each item (e) and disturbance terms of each latent factor (d). Model fit: χ²=709.251; df=166; X²/df=4.273; CFI=0.894; TLI=0.879; RMSEA=0.076; SRMR=0.0508. CES-D, Center for Epidemiologic Studies Depression Scale; CFI, Comparative Fit Index; RMSEA, root mean square error of approximation; SRMR, standardised root mean residual; TLI, Tucker-Lewis Index.