Key determinants of misdiagnosis of tracheobronchial tuberculosis among senile patients in contemporary clinical practice: A retrospective analysis

Table 5 Comparison of endoscopic features and classification of tracheobronchial tuberculosis in the two groups

Variables	Categories	Misdiagnosed group, n = 62	Diagnosed group, n = 58	χ2	P value
Bronchoscopy before admission		21 (33.87)	51 (87.93)	36.491	0.000b
Classification of TBTB	I	2 (3.23)	4 (6.9)	-	0.369
	II	17 (27.42)	19 (32.76)
	III	6 (9.68)	2 (3.45)
	IV	27 (43.55)	20 (34.48)
	V	1 (1.61)	0 (0)
	VI	9 (14.52)	13 (22.41)
Range of lesion involvement	Trachea	3 (4.84)	7 (12.07)	-	0.855
	left principal bronchus	6 (9.68)	8 (13.79)
	left upper bronchus	16 (25.81)	13 (22.41)
	left lower bronchus	7 (11.29)	6 (10.34)
	Right principal bronchus	15 (24.19)	12 (20.69)
	Right upper bronchus	4 (6.45)	3 (5.17)
	Right middle bronchus	11 (17.74)	9 (15.52)

Data presented as n (%).

^bP < 0.01.