Table 4.

Studies reporting lymph node metastasis of T1 gallbladder cancer n (%)

	T1a	T1b	Odds ratio	95% CI
Goetze et al[5]	0/21	1/72 (1.4)	1.296	1.159-1.448
Yildirim et al[15]	0/5	1/8 (12.5)	1.714	1.063-2.765
You et al[3]	0/27	2/25 (8.0)	2.174	1.610-2.935
Kim et al[17]	0/10	1/9 (11.1)	2.250	1.342-3.771
Ogura et al[13]	5/201 (2.5)	25/165 (15.2)	7.000	2.616-18.733