Table 3

- Relationship between types of foreign body and different parameters.

Type of foreign body
Variables		Coin n=93		Battery n=21		Food bolus n=6		Other n=3		P-value	Pair analysis
Variables		n	%	n	%	n	%	n	%	P-value	Pair analysis
Clinical cresentation	Age
	(1–4)	29	31.2	17	81	1	16.7	17	51.5	<0.001	P1 = 0.001 P2 = 0.001 P3 = 0.103 P4 = 0.001 P5 = 0.147 P6 = 0.009
	(5–8)	41	44.1	4	19	1	16.7	13	39.4	<0.406
	(9–11)	19	20.5	0	0	1	16.7	1	3	<0.847
	(12–15)	4	4.3	0	0	3	50	2	6.1	<0.355
	Previous history of FB ingestion
	No	93	100	21	100	6	100	33	100	0.531	P1 = 0.649 P2 = 0.177 P3 = 0.516 P4 = 0.247 P5 = 0.936 P6 = 0.256
	Hospital stay
	24 hours	92	98.9	17	81	6	100	33	100	<0.001	P1 ≤ 0.001 P2 = 0.798 P3 = 0.550 P4 = 0.247 P5 = 0.009
	> 24 hours	1	1.1	4	19	0	0	0	0	<0.001	P1 ≤ 0.001 P2 = 0.798 P3 = 0.550 P4 = 0.247 P5 = 0.009
Hospital course	Chest x-ray finding
	No FB seen	0	0	0	0	4	66.7	2	6.1	<0.001	P1 = 0.117 P2 ≤ 0.001 P3 = 0.052 P4 ≤ 0.001 P5 = 0.132 P6 = 0.001
	(C1–C6)	53	57	8	38.1	2	33.3	19	57.6	<0.733
	(C7–T4)	40	43	13	61.9	0	0	12	36.4	<0.453
	Need for rigid upper endoscopy
	Yes	90	96.8	20	100	3	50	32	97	<0.001	P1 = 0.416 P2 ≤ 0.001 P3 = 0.956 P4 = 0.001 P5 = 0.432 P6 ≤ 0.001
	No	3	3.2	0	0	3	50	1	3	<0.001
	Esophygeoscopy finding
	No operation	27	29	4	19	2	33.3	6	18.2	<0.001	P1 ≤ 0.001 P2 ≤ 0.001 P3 = 0.014 P4 = 0.193 P5 ≤ 0.001 P6 = 0.212
	Complication	1	1.1	15	71.4	2	33.3	4	12.1	<0.351
	No complication	65	69.9	2	9.5	2	33.3	23	69.7	<0.817

P1: Coin versus (vs.) Battery group, P2: Coin vs. Food group, P3: Coin vs. Others group, P4: Battery vs. Food group, P5: Battery vs. Others group, P6: Food vs. Others group