Table 2.
DXA and laboratory results in the patients undergoing primary spine surgery.
| Parameter | Discectomy (n=30) | Decompression (n=145) | Fusion (n=75) | P-value |
|---|---|---|---|---|
| DXA | ||||
| BMD left hip (g/cm2) | 1.03 (.93 to 1.10) | .95 (.91 to .97) | .99 (.92 to 1.02) | .21 |
| T-score left hip | -.4 (-.9 to .3) | -.8 (-1.0 to -.5) | -.5 (-1.1 to .0) | .38 |
| BMD right hip (g/cm2) | 1.01 (.91 to 1.06) | .95 (.90 to .99) | .92 (.88 to 1.00) | .22 |
| T-score right hip | -.3 (-.9 to .1) | -.8 (-1.0 to -.3) | -.8 (-1.2 to -.3) | .42 |
| BMD lumbar spine (g/cm2) | 1.16 (1.09 to 1.24) | 1.19 (1.15 to 1.25) | 1.08 (1.03 to 1.18) | .03 |
| T-score lumbar spine | -.3 (-.7 to .6) | .1 (-.4 to .5) | -.7 (-1.3 to .0) | .04 |
| T-score lowest | -.9 (-1.2 to -.5) | -1.0 (-1.2 to -.7) | -1.4 (-1.9 to -.7) | .32 |
| Osteopenia (%) | 9 (30.0%) | 63 (43.4%) | 31 (41.3%) | .40 |
| Osteoporosis (%) | 2 (6.7%) | 16 (11.0%) | 11 (14.7%) | .49 |
| - Diagnosed before? | 0/2 (.0%) | 4/16 (25.0%) | 4/11 (36.4%) | |
| - Women | 2/16 (12.5%) | 10/88 (11.4%) | 9/54 (16.7%) | |
| - Men | 0/14 (.0%) | 6/57 (10.5%) | 2/21 (9.5%) | |
| Laboratory | ||||
| Calcium (mmol/l) | 2.35 (2.30 to 2.40) | 2.35 (2.32 to 2.37) | 2.32 (2.30 to 2.34) | .18 |
| 25-OH-D3 (nmol/l) | 54.9 (42.2 to 74.5) | 55.9 (47.4 to 65.1) | 50.8 (35.9 to 57.6) | .16 |
| - Vitamin D deficiency (n, %) | 21/30 (70.0%) | 92/129 (71.3%) a | 51/66 (77.3) a | .63 |
| PTH (pmol/l) | 5.46 (4.30 to 6.03) | 5.10 (4.44 to 5.30) | 5.11 (4.70 to 5.38) | .69 |
| - HPT (n, %) | 3/24 (12.5%) a | 14/98 (14.3%) a | 8/49 (16.3%) a | .90 |
| Phosphate (pmol/l) | 3.00 (2.80 to 3.20) | 3.00 (2.90 to 3.10) | 3.10 (2.80 to 3.20) | .98 |
| ALP (U/l) | 77.0 (69.0 to 85.0) | 73.5 (70.0 to 77.0) | 72.0 (65.0 to 77.0) | .19 |
| Creatinine (mg/dl) | .89 (.81 to .97) | .89 (.84 to .94) | .86 (.80 to .92) | .65 |
| CRP (mg/dl) | .24 (.00 to .40) | .10 (.10 to .20) | .20 (.10 to .60) | .03 |
| Leukocytes (G/l) | 8.15 (6.90 to 9.50) | 7.00 (6.60 to 7.50) | 7.10 (6.40 to 8.00) | .22 |
| Hemoglobin (g/dl) | 13.4 (13.0 to 13.9) | 14.0 (13.6 to 14.2) | 13.7 (13.5 to 14.2) | .66 |
Results are presented as median with 95% confidence intervals or n (%). Bold indicates significant differences (P < .05).
aindicates deviating number of measured patients for the individual parameter. HPT: hyperparathyroidism.