Efficacy and risk factors for anxiety and depression after mini-incision hip arthroplasty for femoral head osteonecrosis

Table 3 Assignment table

Factors	Assignment
Age	≥ 60 years old = 1, < 60 years old = 0
Sex	Male = 0, female = 1
Education level	≥ Junior high school = 0, < Junior high school = 1
Annual income	≥ 50000 CNY = 0, < 50000 CNY = 1
Surgical plan	Minimally invasive = 0, conventional = 1
Postoperative VAS score	≥ 4 = 1, < 4 = 0
Operation time	≥ 95 min = 1, < 95 min = 0
Treatment cost	≥ 35000 CNY = 1, < 35000 CNY = 0
Anxiety and depression	Negative emotion group = 1, emotional stability group = 0

VAS: Visual analogue scales.