VWF and Other metabolic disease: As an example, in the pooled cross-sectional study logistic regression analysis with VWF as the outcome (Table 2) showed that the χ2 statistic varied from 3.61 (df 7) for the interaction A(8) × age (P = 0.824) to 0.34 (df 2) for the interaction A(8) × metabolic disorders (P = 0.844).