Correlation between Derkay scores and time between operations
The correlation between Derkay score and surgical interval was analyzed by linear correlation, and the results showed that Derkay score had a weak correlation with surgical interval (r=-0.29, p<0.01).
According to the Derkay score three-equal method, the patients were divided into three groups: 0~9 points, 10~18 points, and 19~27 points, and the interval between operations was 158.0±119.2 days, 123.4±118.6 days, 62.6±48.7 days (p<0.01).
The relationship between surgery interval and Derkay score is shown in fig.2.B.