Table 5 Weighted scoring system for the outcome prediction of core decompression

Sex

 Female

0

 Male

6

Age (years)

 <30

0

 <39

1

 <53

2

 ≥53

2

Occupation

 Weight-Bearing

0

 Seatting

2

 Standing

0

Haemoglobin (g/L)

 ≥154.2

0

 <154.2

1

 <145.5

2.5

 <134

6

Duration of disease (months)

 <1

0

 <2.1

0

 <3.9

0

 ≥3.9

3

Aetiology

 Alcohol-induced

0

 Idiopathic

2

 Steroid-induced

2

The combined necrosis angle

 <72°

0

 <117°

1

 <168°

3.5

 ≥168°

7