Table 1. Showing number of different procedures in three groups.

	2level	3level	4level
ACCF	42	18	0
ACDF	64	33	19
DCF	0	0	25
ACHDF	0	47	0
total	106	98	44

ACCF: anterior cervical corpectomy and fusion;

ACDF: anterior cervical discectomy and fusion;

DCF: Discontinuous corpectomy and fusion (DCF) with reservation of the middle vertebra;

ACHDF: anterior cervical hybrid decompression and fusion.