To systematically review and synthesize literature on 1) the overall prevalence of depression and anxiety in SLE patients in identified studies, and 2) the pooled prevalence per metrics of depression and anxiety in adult SLE patients.
This review used (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) PRISMA guidelines and in-depth searches in four databases (1954-2016; Ovid-based Medline, Embase, PsycINFO and CINAHL) to identify articles on the prevalence of depression and/or anxiety in adult SLE patients. Included studies were critically appraised and analyzed. The prevalence of depression and anxiety was studied for all included studies, and whenever possible, pooled prevalence (PP) was determined for more commonly used metrics. Statistical and publication bias was assessed using funnel plots.
A total of 3103 references were identified, 226 were selected for detailed review and 72 were included in the final analysis.
The depression PP, obtained from 69 studies representing 23,386 SLE patients, was 35.0% (95% CI: 29.9%-40.3%). The anxiety PP, obtained from 38 studies representing 4439 SLE patients, was 25.8% (95% CI: 19.2%-32.9%).
The more commonly used instruments included the Centre for Epidemiological Studies - Depression (CES-D), Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), Hospital Anxiety and Depression Scales (HADS-A/D), and Hamilton Rating Scales for Depression/Anxiety (HAM-D/A)]. The CES-D was utilized in 13 studies including 1856 SLE patients; depression PP was 41.5% (95% CI: 35.1%-48.1%). The BDI was utilized in 14 studies including 1355 SLE patients and the BAI in 3 studies including 489 patients; depression PP was 39.9% (95% CI: 31.1%-49.1) and anxiety PP was 38.4% (95% CI: 34.2%-42.8%). The HADS-D was utilized in 14 studies including 1238 SLE patients and the HADS-A in 12 studies including 1099 patients respectively; its depression PP was 24.4% (95% CI: 19.1%-30.1%) and anxiety PP was 38.3% (95% CI: 29.1%-47.9%). The HAM-D was utilized in 4 studies including 267 SLE patients and the HAM-A in 4 studies including 213 patients respectively; its depression PP was 40.0% (95% CI: 23.0%-59.0%) and anxiety PP was 39.0% (95% CI: 32.0%-45.0%).
There was high variability in the prevalence of depression and anxiety, ranging from 8.7%-78.6% and 1.1%-71.4%, respectively. This could be attributed to the lack of consistency in the metrics used and its definition for depression and anxiety in SLE. Studies that used a specific metric, such as the CES-D, BDI or HAM-D, yielded similar depression prevalence. The HADS-D had the lowest prevalence. All metrics of anxiety yielded similar anxiety prevalence.