Vitamin D insufficiency is associated with an increased risk of early clinical failure in follicular lymphoma

S I Tracy, M J Maurer, T E Witzig, M T Drake, S M Ansell, G S Nowakowski, C A Thompson, D J Inwards, P B Johnston, I N Micallef, C Allmer, W R Macon, G J Weiner, S L Slager, T M Habermann, B K Link, J R Cerhan, S I Tracy, M J Maurer, T E Witzig, M T Drake, S M Ansell, G S Nowakowski, C A Thompson, D J Inwards, P B Johnston, I N Micallef, C Allmer, W R Macon, G J Weiner, S L Slager, T M Habermann, B K Link, J R Cerhan

Abstract

We evaluated whether vitamin D insufficiency (VDI; 25(OH)D <20 ng/ml) was associated with adverse outcomes among follicular lymphoma (FL) patients using an observational prospective cohort study of 642 FL patients enrolled from 2002-2012. The median age at diagnosis was 60 years. At a median follow-up of 59 months, 297 patients (46%) had an event (progression, treatment failure), 78 had died and 42 (6.5%) had a lymphoma-related death. VDI was associated with inferior event-free survival (EFS) at 12 months (EFS12, odds ratio (OR)=2.05; 95% confidence interval (CI) 1.18-3.54), overall survival (OS, hazards ratio (HR)=2.35; 95%CI 1.37-4.02), and lymphoma-specific survival (LSS, HR=2.97; 95% CI 1.52-5.80) for the full cohort. Among patients treated with immunochemotherapy (IC), VDI was associated with inferior EFS12 (OR=3.00; 95% CI 1.26-7.13), OS (HR=2.86; 95% CI 1.39-5.85), and LSS (HR=2.96; 95% CI 1.29-6.79). For observed patients, VDI was associated with inferior OS (HR=2.85; 95% CI 1.20-6.76). For other therapies, VDI was associated with inferior OS (HR=3.06; 95% CI 1.01-9.24). Our work is the first to reveal an association of VDI with early clinical failure, and to demonstrate an association of VDI with adverse outcomes among patients who are observed or treated with therapies other than IC. Our findings suggest a potentially modifiable prognostic factor to address in patients with FL.

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Kaplan–Meier curves for 25(OH)D insufficiency and OS for (a) all patients; (b) patients treated with IC; (c) patients observed without receiving therapy; and (d) patients receiving other therapies.
Figure 2
Figure 2
Kaplan–Meier curves for 25(OH)D insufficiency and EFS for (a) all patients; (b) patients treated with immunochemotherapy (IC); (c) patients observed without receiving therapy; and (d) patients receiving other therapies.

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Source: PubMed

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