Table 2. Comparison of types of aspiration in patients with different feeding patterns.

Group	Number of cases	Overt aspiration, n [%]			Silent aspiration, n [%]
		Occurrence	Did not occur		Occurrence	Did not occur
Oral feeding group	103	16 [16]	87 [84]		54 [52]	49 [48]
Gastric tube feeding group	128	38 [30]	90 [70]		70 [55]	58 [45]
Post-pyloric feeding group	117	24 [21]	93 [79]		47 [40]	70 [60]
Total	348	78 [22]	270 [78]		171 [49]	177 [51]
χ2 value	6.941				5.787
P value	0.031				0.055