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Retrospective Study
©The Author(s) 2025.
World J Psychiatry. Oct 19, 2025; 15(10): 108844
Published online Oct 19, 2025. doi: 10.5498/wjp.v15.i10.108844
Table 5 Disease-related information among patients of different age groups, n (%)

18-30 years old (n = 29)
31-40 years old (n = 35)
41-50 years old (n = 36)
> 50 years old (n = 27)
χ2
P value
Cotton-Myer grading6.0580.734
    I1 (3.4)5 (14.3)5 (13.9)4 (14.8)
    II4 (13.8)5 (14.3)4 (11.1)2 (7.4)
    III17 (58.6)16 (45.7)22 (61.1)14 (51.9)
    IV7 (24.2)9 (25.7)5 (13.9)7 (25.9)
Number of prior surgeries4.5950.868
    None1 (3.4)6 (17.1)4 (11.1)3 (11.1)
    111 (38.0)14 (40.0)12 (33.3)11 (40.7)
    29 (31.0)7 (20.0)10 (27.8)8 (29.6)
    ≥ 38 (27.6)8 (22.9)10 (27.8)5 (18.6)
Type of tracheal tubes7.1140.311
    T-tube13 (44.8)19 (54.3)16 (44.5)11 (40.7)
    Metal tracheostomy tube12 (41.4)14 (40.0)17 (47.2)9 (33.4)
    Cuffed tracheostomy tube4 (13.8)2 (5.7)3 (8.3)7 (25.9)
Duration of intubation (months)5.1530.525
    ≤ 612 (41.4)14 (40.0)9 (25.0)9 (33.4)
    6-129 (31.0)12 (34.3)20 (55.6)12 (44.4)
    > 128 (27.6)9 (25.7)7 (19.4)6 (22.2)


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