Identification of EGFR as a Novel Key Gene in Clear Cell Renal Cell Carcinoma (ccRCC) through Bioinformatics Analysis and Meta-Analysis

Table 2

The baseline characteristics of 10 trials.

Study	Country	Age	Case	Control	Outcome	Quality
Axel 2005	Germany	63	149	0	①③④	9
Atkins 2006	Germany	NA	99	15	①⑤	8
Chen 2011	China	56	30	12	①②⑤	8
Duan 2008	China	53.5	80	24	⑤	7
Duygu 2016	Turkey	58	100	0	②③④	9
Feng 2009	China	50.8	66	15	②⑤	8
Gordana 2012	Croatia	61	94	0	①②	8
Ju 2014	China	68.3	51	12	②⑤	8
Minner 2011	Germany	NA	711	0	①②③④	10
Zhao 2012	China	56.9	39	10	②⑤	8

NA: no mention; ① pathological grading, ② Furhman grading, ③ lymph node status, ④ metastasis, and ⑤ normal tissue.