Table 5.

Weighted scoring system for the outcome prediction of core decompression

Factor	Score
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