PTH and Osteopenia: Furthermore, as shown in Table 2, after controlling for age, BMI, waist circumference, FPG, lipid profiles, Ca, P, PTH, 25(OH)D, β-CTX, PINP, TRAP-5b, and OC, multivariate logistic regression analysis revealed that decreased serum Maresin 1 levels were significantly associated with osteopenia (OR = 0.807, 95% CI 0.660–0.985, P = 0.035) and PMOP (OR = 0.781, 95% CI 0.638–0.955, P = 0.016).