Table 2 Duration of disease, time of procedure, target level, and type of LDP among the two groups and SH diameter in the US group
Variable | Group I (US) (n = 59) | Group II (FL) (n = 62) | Test | p | ||
Duration (months) | MW | |||||
Mean ± SD | 5.95 ± 2.5 | 5.82 ± 2.53 | ||||
Median | 5 | 5 | 0.60 | 0.55 | ||
Range | 2–11 | 2–11 | NS | |||
Time of procedure (min) | t | < 0.001** | ||||
Mean ± SD | 6.10 ± 0.71 | 11.52 ± 1.14 | 31.28 | |||
Median | 6 | 11.5 | ||||
Range | 5–8 | 10–13.5 | ||||
Sacral hiatus diameter | ||||||
Mean ± SD | 4.69 ± 1.69 | |||||
Median | 4.9 | – | – | – | ||
Range | 1.3–8.9 | |||||
Variable | No | % | No | % | χ2 | p |
Duration (months) | ||||||
< 6 | 34 | 57.6 | 35 | 56.5 | 0.02 | 0.90 |
≥ 6 | 25 | 42.4 | 27 | 43.5 | NS | |
Target level | ||||||
L2–3/L3–4 | 4 | 6.8 | 5 | 8.1 | ||
L4–5 | 15 | 25.4 | 16 | 25.8 | ||
L4–5/L5–S1 | 25 | 42.4 | 26 | 41.9 | 0.09 | 0.99 |
L5–S1 | 15 | 25.4 | 15 | 24.2 | NS | |
Type of lumbar disc | ||||||
Central | 37 | 62.7 | 38 | 61.3 | ||
Diffuse | 17 | 28.8 | 18 | 29 | 0.06 | 0.97 |
Foraminal | 5 | 8.5 | 6 | 9.7 | NS | |