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Table 4 The hazard ratios for risk factors of conversion to THA for patients undergoing autologous or allogeneic fibular grafts

From: Long-term survival and clinical outcomes of non-vascularized autologous and allogeneic fibular grafts are comparable for treating osteonecrosis of the femoral head

Variables

Model 1

Model 2

Model 3

Model 4

HR (95% CI)

HR (95% CI)

HR (95% CI)

HR (95% CI)

Surgical methods

 

Autologous fibular grafts

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

Allogeneic fibular grafts

1.624 (0.583–4.526)

1.77 (0.634–4.936)

1.897 (0.69–5.218)

1.716 (0.615–4.786)

Age

 

 ≤ 37 years

 

1.00 (reference)

  

 > 37 years

 

6.931 (1.996–24.074)*

  

BMI

 

 ≤ 24

 

1.00 (reference)

  

 > 24

 

2.249 (0.841–6.015)

  

ARCR stage

 

 Stage II

 

1.00 (reference)

  

 Stage III

 

0.823 (0.312–2.173)

  

Etiologies

 

 Glucocorticoid

 

0.881 (0.16–4.844)

 

 Alcoholic

 

2.817 (0.623–12.739)

 

 Traumatic

  

0.395 (0.052–3.003)

 Idiopathic

  

0.905 (0.119–6.891)

  1. Note:
  2. Model 1: Cox hazard proportional analysis without adjustment
  3. Model 2: Multivariate Cox hazard proportional analysis including age, BMI, and ARCR stage
  4. Model 3: Multivariate Cox hazard proportional analysis including glucocorticoid and alcoholic
  5. Model 4: Multivariate Cox hazard proportional analysis including traumatic and idiopathic
  6. *p < 0.05, > 0.05