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Table 3 The PUFHS

From: Prediction of early vascular cement leakage following percutaneous vertebroplasty in spine metastases: the Peking University First Hospital Score (PUFHS)

Characteristics included in the PUFHSa Scores Estimatesb
Intercept   − 2.67
Primary cancer types
 Slow growth 1 0.26
 Moderate growth 2
 Rapid growth 3
Number of treated vertebrae levels
 1 1 0.65
 2 2
 3 3
  ≥ 4 4
Vertebrae collapse
 No collapse 1 −0.30
 Less than 50% 2
 More than 50% 3
  1. Notes: The PUFHS was created as follows:
  2. P(Y = 1) = e−2.67 + 0.26x1 + 0.65x2 − 0.30x3 / (1+ e−2.67 + 0.26x1 + 0.65x2 − 0.30x3); x 1 indicates primary cancer types; x 2 indicates number of treated vertebrae levels; x 3 indicates vertebrae collapse
  3. An example was given as follows: if a spine metastasis patient with rapid growth cancer (3 points) had more than 50% vertebrae collapse (3 points) and one treated vertebra level (1 point), the vascular cement leakage probability of the patient was P (Y = 1) = e−2.67 + 0.26  3 + 0.65  1 − 0.30  3 / (1+ e−2.67 + 0.26  3 + 0.65  1 − 0.30  3) = 10.53%
  4. Abbreviations: PUFHS Peking University First Hospital Score
  5. aindicates characteristics were included according to the Least Absolute Shrinkage and Selection Operator; bindicates estimates were calculated from logistic regression analysis