Poster Topical Area: Aging and Chronic Disease
Poster Board Number: 97
Objective: To examine cross-sectional associations between three dietary quality indices [Dietary Approaches to Stop Hypertension (DASH), American Heart Association diet score (AHA-DS), and Mediterranean diet score (MeDS)] with bone mineral density (BMD) among Puerto Rican adults.
Methods: The Boston Puerto Rican Osteoporosis Study (BPROS) is an ancillary study to the Boston Puerto Rican Health Study, a large cohort of Puerto Rican adults (47-77y) living in the Greater Boston area. A total of 973 of 1504 participants who completed baseline interviews participated in the BPROS; 952 with complete BMD and dietary data were included. Diet assessed with a validated food frequency questionnaire was used to calculate the DASH, AHA-DS and MeDS. BMD, g/cm2 at the trochanter, femoral neck, total hip and lumbar spine (L2-L4) was ascertained using dual-energy X-ray absorptiometry. ANCOVA was used to test associations between each dietary quality index (z-scores) and BMD; and logistic regression to test associations between each dietary index and osteoporosis (t-score ≤ -2.5 g/cm2) at the lumbar spine or femoral neck, adjusting for potential confounders.
Results: Participant mean age was 59.9 y ± 7.6 y; they were mostly female (71%) and had low educational attainment (52.6% <th grade). DASH (scores: 2-36), AHA-DS (scores: 5-69) and MeDS (scores: 0-9) were each positively associated with BMD at the total hip (0.01 ± 0.005 g/cm2, P0.04 for all). Higher DASH was associated with higher femoral neck BMD (0.009 ± 0.004 g/cm2, P=0.03). AHA-DS and MeDS were positively associated with BMD at the trochanter (0.009-0.11 g/cm2, P<0.04). DASH approached statistical significance with BMD at the trochanter and lumbar spine (P<0.09). DASH, AHA-DS and MeDS were each associated with lower likelihood of osteoporosis (OR: 0.66, 95%CI: 0.51-0.85 vs. 0.64, 95%CI: 0.49-0.85 vs 0.77, 95%CI: 0.59-0.99, respectively) (Table 2).
Conclusion: Those with higher dietary quality had higher BMD and lower likelihood of osteoporosis. While each of these scores were positively associated with BMD, none were developed specifically to focus on bone health. A culturally sensitive dietary quality index that builds on current indices and highlights dietary components important for bone health may be even more useful.
NIH K01 AR067894; P50 HL105185; R01 AG027087
University of Massachusetts Lowell