Table 1.
Characteristics for patients with degenerative spondylolisthesis with spinal stenosis.
| Variables |
PLF (n = 106) |
PPS (n = 79) |
PLIF (n = 48) |
P Valuea |
| Age, mean (SD) | 63.12 (13.75) | 57.05 (12.21) | 46.19 (12.43) | < .0001 |
| Gender | ||||
| Female, n (%) | 59 (55.66) | 42 (53.16) | 20 (41.67) | .28 |
| Male, n (%) | 47 (44.34) | 37 (46.84) | 28 (58.33) | |
| ASA | ||||
| 1, n (%) | 9 (8.49) | 3 (3.8) | 3 (6.25) | .58 |
| 2, n (%) | 59 (55.66) | 48 (60.76) | 31 (64.58) | |
| 3, n (%) | 35 (33.02) | 28 (35.44) | 14 (29.17) | |
| 4, n (%) | 3 (2.83) | 0 (0) | 0 (0) | |
| BMI, mean (SD) | 29.14 (6.67) | 30.69 (7.1) | 30.14 (4.71) | .26 |
| Smoking history | ||||
| No, n (%) | 62 (58.49) | 41 (51.9) | 13 (27.08) | .001 |
| Yes, n (%) | 44 (41.51) | 38 (48.1) | 35 (72.92) | |
| Incidental durotomy | ||||
| No, n (%) | 100 (94.34) | 74 (93.67) | 48 (100) | .23 |
| Yes, n (%) | 6 (5.66) | 5 (6.33) | 0 (0) | |
| Length of stay, mean days (SD) | 3.16 (2.85) | 2.99 (1.21) | 2.83 (1.36) | .66 |
| Insurance | ||||
| Medicaid, n (%) | 3 (2.83) | 1 (1.27) | 5 (10.42) | .004 |
| Medicare, n (%) | 54 (50.94) | 29 (36.71) | 13 (27.08) | |
| Worker's compensation, n (%) | 5 (4.72) | 4 (5.06) | 7 (14.58) | |
| Private insurance, n (%) | 44 (41.51) | 44 (55.7) | 22 (45.83) | |
| Charity, n (%) | 0 (0) | 0 (0) | 1 (2.08) | |
| Self-pay, n (%) | 0 (0) | 1 (1.27) | 0 (0) |
Abbreviations: PLF, noninstrumented posterolateral fusion in situ; PPS, posterolateral fusion with pedicle screws; PLIF, PPS with interbody device; ASA, American Society of Anesthesiologists score; BMI, body mass index.
a
P value from Fisher's exact test for categorical variables from ANOVA for continuous variables.