Table 1.
Demographics of risk factor analysis group, N = 75
| Characteristics | Index | Value |
|---|---|---|
| Age | Mean (St. D) | 58.9 (12.9) |
| Gender: Female | N (%) | 50 (66.6 %) |
| Male | N (%) | 25 (33.3 %) |
| Ethnicity: Caucasian | N (%) | 66 (88.0 %) |
| Hispanic | N (%) | 4 (5.3 %) |
| Refused | N (%) | 5 (6.7 %) |
| Previous spinal surgical intervention: | N (%) | 16 (21.3 %) |
| Primary | ||
| Reoperation | N (%) | 59 (78.7 %) |
| Body mass index (BMI) | Mean (St. D) | 26.7 (5.5) |
| Smoking status: Never smoker | N (%) | 31 (41.3 %) |
| Ever smoker | N (%) | 36 (48.0 %) |
| Not specified | N (%) | 8 (10.7 %) |