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Table 3 Comparison of radiologic parameters

From: Association of complete uncinate process removal on 2-year assessment of radiologic outcomes: subsidence and sagittal balance in patients receiving one-level anterior cervical discectomy and fusion

  ACDF without UPR
(n = 24)
Mean ± SD, N(%)
ACDF with complete UPR
(n = 24)
Mean ± SD, N(%)
p-value
C2–C7 lordosis (°)
Preoperation 15.50(9.45–17.60), (3.90–20.80) 14.10(5.45–19.55), (3.90–26.40) 0.781
Postoperation 15.80(10.25–17.90), (7.70–27.90) 17.25(8.50–19.10), (3.00–27.30) 0.772
2 years follow-up 15.95(13.45–24.15), (10.20–28.50) 14.65(11.00–29.70), (1.10–45.50) 0.877
2 years follow-up - Preoperation 3.80(0.70–8.50),(− 5.70–17.00) 5.20(− 3.60–15.30),(− 12.20–30.00) 0.984
Segmental angle (°)
Preoperation 5.45(4.60–5.95), (1.80–7.10) 4.95(4.00–5.50), (1.30–7.10) 0.215
Postoperation 5.85(2.90–7.45), (0.50–14.40) 5.70(3.45–7.55), (1.00–14.40) 0.918
2 years follow-up 5.90(5.10–7.25), (1.20–9.60) 5.20(3.75–6.10), (0.90–10.00) 0.207
2 years follow-up - Preoperation 0.70(− 0.75–2.90), (− 4.80–5.30) 0.50(− 1.60–2.30), (− 4.80–6.90) 0.643
Disc height (mm)
Preoperation 5.60(5.15–6.18), (4.23–7.90) 5.96(5.58–6.26), (5.18–6.97) 0.173
Postoperation 7.16(6.46–7.90), (5.84–8.91) 7.53(7.27–7.84), (6.52–8.91) 0.117
2 years follow-up 6.22(5.41–6.58), (4.82–13.12) 5.19(5.15–5.55), (5.01–5.82) < 0.001*
2 years follow-up – Preoperation 0.08(− 0.52–2.02), (− 1.42–6.95) − 0.44(− 1.15--0.19), (− 1.78–0.45) 0.007*
C2–C7 SVA (mm)
Preoperation
Postoperation
20.05(15.39–26.31), (12.46–30.53)
19.33(13.92–26.13), (9.77–29.04)
17.06(15.15–24.72), (6.97–28.53)
18.58(13.25–29.88), (6.72–39.25)
0.261
0.877
2 years follow-up 15.78(12.36–21.51), (10.62–30.84) 17.28(11.18–29.57), (4.42–41.93) 0.703
2 years follow-up - Preoperation −3.98(− 5.80--2.84), (− 9.62–7.01) − 0.26(− 4.15–5.88), (− 5.32–15.96) 0.005*
St-SVA (mm)
Preoperation 30.77(24.05–35.06), (15.71–42.98) 25.68(20.72–29.36), (13.25–55.43) 0.018*
Postoperation 27.65(17.49–28.63), (10.59–52.27) 28.94(17.12–30.42), (4.40–61.23) 0.414
2 years follow-up 24.53(11.82–32.77), (9.37–48.84) 28.56(11.53–41.36), (4.74–77.58) 0.496
2 years follow-up - Preoperation −1.30(− 3.00–1.25), (− 14.90–2.90) 0.50(− 0.70–2.75), (− 15.40–7.10) 0.066
T1 slope (°)
Preoperation 25.15(20.25–27.90), (12.00–31.60) 24.10(22.00–25.90), (11.90–44.00) 0.687
Postoperation 24.85(17.10–28.10), (13.60–32.80) 25.40(20.50–27.55), (14.80–32.50) 0.599
Last follow-up 23.50(17.60–27.00), (12.00–33.20) 25.80(20.75–28.00), (15.40–49.20) 0.327
Last follow-up - Preoperation −1.30(− 3.00–1.25), (− 14.90–2.90) 0.50(− 0.70–2.75), (− 15.40–7.10) 0.066
SCA (°)
Preoperation 104.65(101.20–108.65), (89.90–115.90) 111.05(107.85–114.70), (101.20–120.00) < 0.001*
Postoperation 104.75(100.90–108.45), (94.60–117.00) 105.90(103.65–111.45), (95.50–113.60) 0.397
2 years follow-up 105.80(100.60–111.60), (92.80–115.50) 105.80(99.10–107.30), (87.30–121.40) 0.634
2 years follow-up - Preoperation 3.65(−4.50–8.35), (− 13.30–10.70) −8.15(− 15.15–2.70), (− 20.10–9.80) 0.004*
Subsidence 1 (4%) 8 (33%) 0.023*
Fusion 22 (92%) 22 (92%) 0.999
  1. SVA; sagittal vertical axis, St-SVA; sellar turcica–sagittal vertical axis,
  2. SCA; spinocranial angle
  3. * Statistically significant