Proportions of reporting any problem in EQ-5D and EQ VAS among patients with one or more chronic conditions.

*: chi-square test whether there is any difference among any of the three chronic groups with different number of chronic condition;**: ANOVA test; SE: standard error.*：卡方检验（chi-square test）：用于检验三类慢性疾病种数不同的组别之间是否存在差异；**：方差分析（ANOVA）检验；SE：标准误（standard error）。