[Retracted] Early Warning of Basketball Injury Risk Based on Attribute Reduction Algorithm

Table 1

Attribute reduction algorithm for early warning index of basketball players’ injury.

Sign	Index	Sign	Index	Sign	Index
A	Age	B	Sports grade	C	Menstrual cycle
D	Physical fitness index	E	History of injuries	F	Degree of recovery from past injuries
	Joint flexibility	H	Joint stability	I	Strength comparison of front and back thigh muscles
J	Comparison of left and right thigh circumference	K	Physical coordination	L	Arch shape of foot
M	Engineering level	N	Action standard degree	O	Joint protection
P	Intensity of training	Q	Training ground	R	Training plan
S	Equipment replacement	T	Physical fatigue	U	Subjective emotion