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 (66.6Â %) |
     Male | N (%) | 25 (33.3 %) |
Ethnicity: Caucasian | N (%) | 66 (88.0Â %) |
    Hispanic | N (%) | 4 (5.3 %) |
    Refused | N (%) | 5 (6.7 %) |
Previous spinal surgical intervention: | N (%) | 16 (21.3Â %) |
      Primary | ||
      Reoperation | N (%) | 59 (78.7 %) |
Body mass index (BMI) | Mean (St. D) | 26.7 (5.5) |
Smoking status: Never smoker | N (%) | 31 (41.3Â %) |
         Ever smoker | N (%) | 36 (48.0 %) |
        Not specified | N (%) | 8 (10.7 %) |