The effect of the difference in C2–7 angle on the occurrence of dysphagia after anterior cervical discectomy and fusion with the zero-P implant system

Table 2 The pre- and postoperative radiographic parameters

Groups	Non-dysphagia group (N = 139)	Dysphagia group(N = 42)	P
Preoperative O-C₂ angle (°)	16.14 ± 6.77	15.36 ± 6.56	0.510
Postoperative O-C₂ angle (°)	15.78 ± 3.60	14.46 ± 3.48	0.037
Preoperative C_2–7 angle (°)	15.02 ± 11.61	15.40 ± 7.92	0.843
Postoperative C_2–7 angle (°)	12.14 ± 5.23	19.77 ± 6.17	< 0.001
Preoperative PSTT (mm)	9.39 ± 1.53	11.65 ± 1.88	0.386
Postoperative PSTT (mm)	14.91 ± 4.06	18.06 ± 3.07	< 0.001

ISSN: 1471-2474