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J Psychosom Res. 2013 Feb;74(2):128-34. doi: 10.1016/j.jpsychores.2012.09.021. Epub 2012 Oct 22.

The pattern of depressive symptoms in people with type 2 diabetes: a prospective community study.

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1
Department of Psychiatry, McGill University, Montreal, Quebec, Canada. norbert.schmitz@mcgill.ca

Abstract

OBJECTIVE:

The aim of the present study was to identify and describe longitudinal patterns of depression in a community sample of people with type 2 diabetes in Quebec, Canada.

METHODS:

A prospective community based study in Quebec, Canada, was carried out between 2008 and 2011. Participants with diabetes were assessed at baseline and at 1, 2 and 3 years follow-up (n=1388). Depression was assessed using the patient health questionnaire (PHQ-9).

RESULTS:

Longitudinal latent class analysis yielded four clusters representing different longitudinal patterns of depression: cluster 1 ("no depression"; 67%): participants had neither minor nor major depression over time. Cluster 2 ("slowly increasing prevalence of minor and major depression over time"; 20%): participants had low levels of depression at baseline but increasing levels of minor and major depression over time; while most of the Cluster 3 ("increasing major depression"; 6%) participants had high and increasing levels of major depression over time. Participants in cluster 4 ("improved depression"; 7%) started with high levels of depression but progressed to low levels of depression.

CONCLUSIONS:

Our results provide important evidence of different longitudinal patterns of depression in people with type 2 diabetes. Identification of four distinct groups of participants might improve our understanding of the course of depression and may provide a basis of classification for intervention.

[Indexed for MEDLINE]

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