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Table 6 Subgroup characteristics of included studies

From: Clinical efficacy and safety of posterior minimally invasive surgery in cervical spondylosis: a systematic review

Subgroup title

No. of trials

No. of participants

Decompression

Cervical instability

Significant difference*

Overall

14

479

YES

YES

PARTIAL**

Population characteristics

 Cervical spondylotic radiculopathy

5

207

YES

NO

PARTIAL**

 Cervical spondylotic myelopathy

7

197

YES

NO

YES

 Other types

2

75

YES

NO

YES

Surgical approach

 Channel technique

3

93

YES

NO

YES

 Endoscopic technique

11

386

YES

NO

YES

  1. *Indicates significant difference in the changes of quantitative outcome indicators pre- and postsurgery
  2. **Indicates significant differences in changes in most quantitative outcome indicators before and after surgery