B.6 Kyphosis Data

The data in kyphosis.dat are from Hastie and Tibshirani (1990, p. 301) and were collected on 83 patients undergoing corrective spinal surgery. The objective was to determine important risk factors for kyphosis, or the forward flexion of the spine at least 40 degrees from vertical, following surgery. The risk factors are age in month, the starting vertebrae level of the surgery and the number of vertebrae involved.

Column Type Description
1 metric the age (in month)
2 metric starting vertebrae level of the surgery
3 metric number of vertebrae involved
4 binary indicator for the presence of kyphosis:
0 if absent and 1 if present