Radiologic parameters | Study | L1 | L2 | L3 | L4 | L5 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Range | Number | Mean | SD | Range | Number | Mean | SD | Range | Number | Mean | SD | Range | Number | Mean | SD | Range | Number | ||
Pedicle angle (PA) (0)a | Our results | 9.3 | 1.6 | 6–14 | 156 | 7.4 | 2.1 | 4–12 | 162 | 7.9 | 1.8 | 4–13 | 154 | 11.2 | 3.2 | 5–19 | 156 | 17.0 | 3.1 | 9–25 | 146 |
Zindrick et al | 10.9 | 2.2 | 6.5–14.5 | 26 | 12 | 3.5 | 5–17.5 | 38 | 14.4 | 3.8 | 8.0–23.5 | 68 | 17.7 | 5.2 | 5.5–27.5 | 76 | 29.8 | 6.3 | 19–44 | 76 | |
Midline axis distance (MAD) (mm)a | Our results | 40.3 | 3.3 | 34–49 | 156 | 41.1 | 3.3 | 36–47 | 162 | 38.8 | 3.6 | 31–46 | 154 | 37.3 | 5.3 | 25–45 | 156 | 31.4 | 3.6 | 25–44 | 146 |
Zindrick et al | 44.7 | 4.5 | 36–51 | 26 | 45.5 | 3.7 | 37–52 | 35 | 44.4 | 5.1 | 31–54 | 64 | 40.7 | 4.3 | 27–48 | 74 | 33.7 | 5.6 | 20–44 | 69 | |
Pedicle axis distance (PAD) (mm)a | Our results | 44.8 | 4.8 | 37–56 | 156 | 46.4 | 5.8 | 36–58 | 162 | 43.5 | 5.0 | 35–58 | 154 | 43.7 | 5.0 | 33–58 | 156 | 43.3 | 4.5 | 32–57 | 146 |
Zindrick et al | 50.7 | 4.3 | 42–57 | 26 | 51.9 | 3.7 | 45–58 | 35 | 51.9 | 4.6 | 42–62 | 64 | 49.7 | 4.4 | 43–62 | 74 | 51.0 | 4.7 | 42–62 | 69 | |
Pedicle diameter (PD) (mm)a | Our results | 5.7 | 1.2 | 4–10.4 | 156 | 6.4 | 1.6 | 4–12.2 | 162 | 7.6 | 2.0 | 4.3–14.2 | 154 | 10.1 | 1.8 | 7–14.4 | 156 | 12.6 | 2.1 | 9.6–25.1 | 146 |
Zindrick et al | 8.7 | 2.3 | 4.5–13 | 26 | 8.9 | 2.2 | 4–13 | 30 | 10.3 | 2.6 | 5.3–16 | 49 | 12.9 | 2.1 | 9.1–17 | 36 | 18.0 | 4.1 | 9.1–29 | 56 | |
Transverse pedicle axis distance (TPAD) (mm) | Our results | 45.3 | 3.5 | 40–52 | 156 | 48.1 | 3.6 | 42–55 | 162 | 46.1 | 4.1 | 40–57 | 154 | 45.7 | 4.1 | 39–55 | 156 | 44.1 | 4.3 | 35–57 | 146 |
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