ALB and chronic obstructive pulmonary disease: The prediction probability model was formulated on the basis of multivariate regression, with the following formulation [24,25]: prediction probability P = ex/1 + ex, where e is the natural logarithm, X = −3.682 + 1.140 (age ≥ 85 years) + 1.333 (COPD) + 1.010 (PD) − 1.414 (antiosteoporosis drugs) − 0.682 (duration of antiosteoporosis drug therapy) − 0.884 (albumin ≥ 35 g·L−1).