Association of dietary patterns with the newly diagnosed diabetes mellitus and central obesity: a community based cross-sectional study.

AIM

The purpose of this study was to investigate the association of dietary patterns with the risk of insulin resistance (IR), diabetes mellitus (DM), and central obesity in China.

METHODS

We performed a cross-sectional study on 1432 participants, aged 40-65 years in Hangzhou, Zhejiang province, China. Dietary intake was assessed using a semi-quantitative food frequency questionnaire.

RESULTS

Factor analysis extracted four major dietary patterns: vegetable-fruits, rice-meat, seafood-eggs, and sweet-fast. The vegetable-fruits pattern was inversely associated with HOMA-IR (p < 0.001 in both genders), while sweet-fast food pattern was significantly associated with higher HOMA-IR (p = 0.002 in male, and p < 0.001 in female). The vegetables-fruits pattern was inversely correlated with visceral fat area (VFA) (p = 0.029 in males, and p = 0.017 in females), while sweet-fast food pattern presented a significant direct association (p < 0.001 in male) with VFA in males. There was no association observed between the rice-meat pattern or the seafood-eggs pattern and HOMA-IR or VFA. After adjustment for potential confounding factors, participants in the highest tertile of vegetable-fruits pattern showed a significantly lower risk of DM in both males and females (OR: 0.30, 95% CI: 0.13-0.70 in male, and OR: 0.28, 95% CI: 0.11-0.72 in female), and lower risk of central obesity was observed in males (OR: 0.50, 95% CI: 0.29-0.86 in male). Conversely, participants in the highest tertile of sweet-fast food pattern had higher risk of DM (OR: 2.58, 95% CI: 1.23-5.88 in male), and central obesity (OR: 2.85, 95% CI: 1.67-4.86 in male) only in male. While neither the rice-meat pattern nor the seafood-eggs pattern showed significant association with DM or central obesity in both genders.

CONCLUSIONS

Our findings indicated low risk of IR, DM, and central obesity with vegetable-fruits pattern while inverse relation with sweet-fast food pattern.