Table 2.

Comparison of weaning outcome regarding patient's psychological characteristics (n = 247).

Dimensions	Successful weaning		Failed weaning		Z	P value
	N.	%	N.	%
Presence of anxiety prior to mechanical ventilation
Yes	97	39.3	98	39.7	10.583 (-0.207-)	0.002*
No	39	15.8	13	5.3
Presence of depression prior to mechanical ventilation
Yes	92	37.2	91	36.8	6.542 (-0.163-)	0.011*
No	44	17.8	20	8.1
Presence of delirium prior to mechanical ventilation
Yes	62	25.1	39	15.8	2.763	0.096
No	74	30.0	72	29.1
Sleep quality prior to mechanical ventilation
Bad	81	32.8	57	23.1	1.674	0.433
Sometimes good	39	15.8	38	15.4
Good	16	6.5	16	6.5
Communication with patient during mechanical ventilation
Yes	39	15.8	48	19.4	6.684 (0.152)	0.017*
No	97	39.3	63	25.5
Presence of hallucinations prior to mechanical ventilation
Yes	68	27.5	73	29.6	6.201 (-0.158-)	0.013*
No	68	27.5	38	15.4

z: Wilcoxon signed rank test p: p value for associating between different categories *: Statistically significant at p ≤ 0.05.

(r) for spearman correlation test.