Fig. 2

Correlation between SAI-1 m and DCH. SAI-1 m may prolong DCH in the cases with moderate-to-severe CH (r = 0.906, P = 0.000; and r = 0.880, P = 0.000). Mild: CH is not noticeable, unless under detailed questioning; Moderate: CH is tolerable, but sometimes interferes with my daily activities; Severe: CH is intolerable and always interferes with my daily activities