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Spatial distribution of individuals with symptoms of depression in a periurban area in Lima: an example from Peru.

Ruiz-Grosso, Paulo; Miranda, J Jaime; Gilman, Robert H; Walker, Blake Byron; Carrasco-Escobar, Gabriel; Varela-Gaona, Marco; Diez-Canseco, Francisco; Huicho, Luis; Checkley, William; Bernabe-Ortiz, Antonio.
Ann Epidemiol ; 26(2): 93-99.e2, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26654102


To map the geographical distribution and spatial clustering of depressive symptoms cases in an area of Lima, Peru.


Presence of depressive symptoms suggesting a major depressive episode was assessed using a short version of the Center for Epidemiologic Studies Depression Scale. Data were obtained from a census conducted in 2010. One participant per selected household (aged 18 years and above, living more than 6 months in the area) was included. Residence latitude, longitude, and elevation were captured using a GPS device. The prevalence of depressive symptoms was estimated, and relative risks (RRs) were calculated to identify areas of significantly higher and lower geographical concentrations of depressive symptoms.


Data from 7946 participants, 28.3% male, mean age 39.4 (SD, 13.9) years, were analyzed. The prevalence of depressive symptoms was 17.0% (95% confidence interval = 16.2%-17.8%). Three clusters with high prevalence of depressive symptoms (primary cluster RR = 1.82; P = .003 and secondary RR = 2.83; P = .004 and RR = 5.92; P = .01), and two clusters with significantly low prevalence (primary RR = 0.23; P = .016 and secondary RR = 0; P = .035), were identified. Further adjustment by potential confounders confirmed the high prevalence clusters but also identified newer ones.


Screening strategies for depression, in combination with mapping techniques, may be useful tools to target interventions in resource-limited areas.