Predicting unplanned extubation risk in patients with endoscopic nasobiliary drainage

Table 1 Comparison of baseline characteristics between the unplanned extubation group and normal extubation group

Variables	Unplanned extubation group (n = 60)	Normal extubation group (n = 921)	P value
Gender
Male	39 (65.00)	503 (54.62)	0.143
Female	21 (35.00)	418 (45.38)
Age
Mean age, years	58.4 ± 10.2	52.3 ± 12.6	< 0.001
Age groups, years
≤ 40	8 (13.33)	201 (21.83)	< 0.01
41-60	20 (33.33)	502 (54.51)
≥ 61	32 (53.33)	218 (23.67)
Anthropometric measurements
Weight, kg	62.8 ± 10.4	65.4 ± 11.9	0.087
BMI, kg/m2	22.9 ± 2.8	23.8 ± 3.3	0.054
BMI categories
Underweight (< 18.5 kg/m2)	3 (5.00)	28 (3.04)	< 0.05
Normal (18.5-23.9 kg/m2)	37 (61.67)	537 (58.31)
Overweight (24.0-27.9 kg/m2)	10 (16.67)	284 (30.84)
Obese (≥ 28.0 kg/m2)	10 (16.67)	72 (7.82)
Educational level
Primary school or below	25 (41.67)	248 (26.93)	< 0.001
Junior high school	18 (30.00)	277 (30.08)
Senior high school/vocational	13 (21.67)	220 (23.89)
College or above	4 (6.67)	176 (19.11)
Occupation
Farmer	28 (46.67)	267 (29.00)	< 0.01
Worker	12 (20.00)	201 (21.83)
Office worker	8 (13.33)	185 (20.09)
Retired	10 (16.67)	183 (19.87)
Others	2 (3.33)	85 (9.23)
Time distribution of UE
< 24 h	12 (20.00)
24 h ≤ Time < 48 h	21 (35.00)
48 h ≤ Time < 72 h	21 (35.00)
≥ 72 h	6 (10.00)

Continuous variables are presented as mean ± SD. Categorical variables are presented as number (percentage). Statistical analysis was performed using the χ² test or t-test. P < 0.05 was considered statistically significant. BMI: Body mass index; UE: Unplanned extubation.