Article Figures & Data
Figures
- Figure 1
The mean post-op VAS pain scores were significantly improved in both the 2-level and the 1-level groups (P < .05). There was no significant difference in the mean scores between the groups at any evaluation period (P > .15).
- Figure 2
The mean Oswestry scores improved significantly in both groups (P < .05). At none of the evaluation periods was there a significant difference in the mean scores between the two groups (P > .15).
- Figure 3
The mean satisfaction scores were very similar in the 1- and 2-level groups at all follow-up periods as assessed by a 0-10 point VAS with greater scores indicating greater satisfaction (P > .30).
- Figure 4
There was no significant difference in the proportional distribution of responses to the question,“Would you have the same treatment again?” (P > .25) when comparing 1- vs 2-level TDR.
Tables
1-Level (n = 54) 2-Level (n = 32) Significance Gender P > .70 Male 53.7% 53.1% Female 46.3% 46.9% Age (years): P < .05 Mean 38.0 43.9 Range 19-57 28-59 Levels Operated N/A L3-4 3.7% N/A L4-5 33.3% N/A L5-S1 63.0% N/A L3-4 & L4-5 N/A 12.5% L4-5 & L5-S1 N/A 87.5% Smoking P > .60 Smoker 35.2% 34.4% Non-smoker 64.8% 65.6% Previous Surgery P > .60 Yes 33.3% 37.5% No 66.7% 62.5% Insurance P > .60 Private Insurance 79.2% 74.2% WC 20.7% 25.8% The only significant difference was the mean age in the 2-level cases was significantly greater.
1-Level 2-Level Significance Blood loss (ml) 59.0 79.2 .05 < P < .09 Operative time (min) 61.9 97.8 P < .001 Length of hospitalization (days) 1.89 2.44 P < .05 The mean blood loss, operative time and length of hospitalization were all less in single-level cases (P < .05; f-test).
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