Comparison of Minimally Invasive Percutaneous Plate Osteosynthesis and Open Reduction Internal Fixation on Proximal Humeral Fracture in Elder Patients: A Systematic Review and Meta-Analysis

Table 1

Characteristics of the included studies.

Reference	Number of patients	Gender	Mean age	Follow-up	Operative
	MIPO/ORIF	Male/female	MIPO/ORIF	(Months)	Type
Zhao et al.	37/31	26/42	71.3/71.5	12	Neer: 2, 3, 4
Song	39/39	23/55	64.2	12	Neer: 2, 3, 4
Shang et al.	24/54	19/59	61.6/60.0	12	Neer: 2, 3, 4
Wang et al.	20/20	14/26	69.6/69.7	12	Neer: 2, 3
Lin et al.	43/43	28/58	63/61	12	AO: A, B, C
Liu et al.	47/51	43/55	72.8/49.9	12	Neer: 3, 4
Liu et al.	33/42	28/47	47.3/49.1	12	Neer: 2, 3
Götz et al.	61/46	32/75	65/67.6	12	AO: A, B, C

Note. Neer’s terminology of four-segment classification of displaced fractures and fracture-dislocations relates pattern of displacement (Neer: 2, two-part; Neer: 3, three-part; or Neer: 4, four-part) and key segment displaced. The AO classification is based on the severity of the fracture and the likely disruption to the vascularity of the proximal humerus, including three broad types of fracture. Type A fractures are extra-articular and unifocal, type B fractures are extra-articular and bifocal, and type C fractures are articular.