Table 1.
Demographic Means and Frequencies
| Variable | TLIF (n = 17) | PLF (n = 18) |
|---|---|---|
| Mean age (SD) range |
52 (12) 28–70 |
51 (16) 19–70 |
| Marital status | ||
| Married | 15 | 13 |
| Widowed | 1 | 2 |
| Single | 1 | 3 |
| Employment status | ||
| Employed | 15 | 6 |
| Retired | 1 | 7 |
| Disabled | 0 | 3 |
| Unemployed | 1 | 2 |
| Income level | ||
| >$60,000 | 6 | 2 |
| >$40,000 | 6 | 3 |
| >$20,000 | 4 | 7 |
| <$20,000 | 1 | 6 |
| Onset of symptoms | ||
| >10 years | 3 | 1 |
| >5 years | 3 | 2 |
| >1 year | 9 | 13 |
| <1 year | 2 | 2 |
| Gender | ||
| Male | 10 | 8 |
| Female | 7 | 10 |
| Ethnicity | ||
| Caucasian | 17 | 17 |
| African American | 0 | 1 |
Note. TLIF = transforaminallumbar interbody fusion; PLF = posterior lumbar fusion.