Article Figures & Data
Figures
- Figure 1
Mean Visual Analog Scale (VAS) scores assessing pain decreased significantly in both surgical groups by the 6-week follow-up visit and remained significantly less than the preoperative value throughout the remainder of the 36-month period. Although mean total disc replacement (TDR) VAS scores were less than the fusion scores at each follow-up period, differences were not statistically significant.
- Figure 2
Mean Oswestry Disability Index (ODI) scores decreased significantly in both surgical groups by the 6-week follow-up visit and remained significantly less than the preoperative value throughout the remainder of the 36- month period. Although mean total disc replacement (TDR) ODI scores were less than the fusion scores at each follow-up period, the difference was statistically significant only at the 3-month follow-up.
- Figure 3
Mean postoperative satisfaction scores (greater scores indicate greater satisfaction on a 0 to 10 VAS scale) were high in both groups. Mean scores in the total disc replacement (TDR) group were greater at all visits, but statistically significantly so at the 24-month follow-up (P < .05).
- Figure 4
Responses to the question “Remembering the pain you felt before your surgery, would you have this surgery again?” Values presented are the percentage of patients selecting the indicated response at each of the follow-up periods. At the 6-, 12-, 24-, and 36-month periods, the distribution of the responses was significantly more favorable in the ProDisc-L group (P < .05;χ2).
Tables
- Table 1
Summary of Study Population Characteristics: Total Disc Replacement (TDR) and Fusion Groups
TDR Fusion General Gender Male 55.9% 46.7% Female 44.1% 53.3% Mean age, years 41.1 41.2 Mean body mass index (kg/m2) 27.0 27.0 Pain duration < 1 year 13.4% 10.0% > 1 year 86.6% 90.0% Previous nonfusion spinal surgery 37.0% 23.3% Smoker 32.3% 43.3% Surgical Number of levels operated 1 level 60.6% 53.3% 2 levels 39.4% 46.7% Level(s) operated L3–L4 3.3% 3.3% L4–L5 18.1% 6.7% L5–S1 38.6% 43.3% L3–L4 and L4–L5 3.1% 6.7% L4–5 and L5–S1 36.9% 40.0% Note. No significant differences were observed (all Ps > .05).
- Table 2
Mean Operative Time, Blood Loss, and Length of Hospital Stay in the Total Disc Replacement (TDR) and Fusion Groups
TDR Fusion Operative time, minutes 75.5 232.3 Estimated blood loss, mL 81.4 200.0 Hospital stay, days 2.05 3.33 Note. P < .01 (t test) for all comparisons.
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