Comparison of outcomes between Zero-p implant and anterior cervical plate interbody fusion systems for anterior cervical decompression and fusion: a systematic review and meta-analysis of randomized controlled trials

Table 1 Characteristics of included studies

Author (years)	Country	Study type	Number of samples	Gender (male)	Average age	Follow-up (months)	Surgical level	Outcomes
Author (years)	Country	Study type	ZP/ACP	ZP/ACP	ZP/ACP	ZP/ACP	Surgical level	Outcomes
Chen (2016) [11]	China	RCT	38/34	25/21	56.2/56.9	36/36	3	4, 5, 6, 7
Li (2015) [12]	China	RCT	23/24	14/12	48.2/49.2	24/24	1	1, 2, 6, 7
He (2018) [13]	China	RCT	52/52	28/27	55.4/59.5	24/24	2 to 4	2, 6
Scholz (2020) [14]	Germany	RCT	21/20	13/11	58/58	24/24	2	3, 4, 5, 6
Xiao (2017) [15]	China	RCT	60/60	33/35	42/43	24/24	1	1, 2, 6
Nemoto (2015) [16]	Japan	RCT	24/22	21/21	40.9/41.6	24/24	1	1, 2, 3, 7
Yan (2016) [17]	China	RCT	49/49	29/29	43.1/43.3	6/6	1 to 2	2, 3, 4, 5, 6

Outcomes: 1. Blood loss, 2. Operating time, 3. Visual analogue score, 4. Japanese Orthopaedic Association, 5. Neck Disabled Index, 6. postoperative dysphagia rate, 7. Adjacent-level ossification development rate
ZP zero-profile, ACP anterior cervical plate, RCT randomized controlled trial

ISSN: 1749-799X