Fig. 2
The association between FI and cognitive function based on restricted cubic spline function. A MMSE score. B Cognitive impairment. Abbreviations: FI, frailty index; MMSE, mini-mental state examination. Note: The spline plots were drawn by using 3 knots (10th, 50th, 90th percentiles). Models were adjusted for age, gender, marriage, education level, smoking status, drinking status and regular physical exercise