Table 3.

Multivariant correlations

Variable correlations	LOS ICU	Length of disease	Length of intubation	Reintubation	PEEP	Onset of complication since intubation	Length of tube	Outcome
LOS ICU
Pearson Correlation	1	0.963**	0.881**	−0.422*	0.340	0.298	0.526**	−0.425*
Significant (two-tailed)		0.000	0.000	0.020	0.066	0.109	0.003	0.019
n	30	30	30	30	30	30	30	30
Length of disease
Pearson Correlation	0.963**	1	0.889**	−0.494**	0.338	0.367*	0.631**	−0.486**
Significant (two-tailed)	0.000		0.000	0.006	0.068	0.046	0.000	0.006
n	30	30	30	30	30	30	30	30
Length of intubation
Pearson Correlation	0.881**	0.889**	1	−0.486**	0.471**	0.287	0.462*	−0.601**
Significant (two-tailed)	0.000	0.000		0.006	0.009	0.124	0.010	0.000
n	30	30	30	30	30	30	30	30
Reintubation
Pearson Correlation	−0.422*	−0.494**	−0.486**	1	−0.351	−0.371*	−0.264	0.408*
Significant (two-tailed)	0.020	0.006	0.006		0.057	0.043	0.158	0.025
n	30	30	30	30	30	30	30	30
PEEP
Pearson Correlation	0.340	0.338	0.471**	−0.351	1	0.373*	0.061	−0.176
Significant (two-tailed)	0.066	0.068	0.009	0.057		0.043	0.748	0.351
n	30	30	30	30	30	30	30	30
Onset of complication since intubation
Pearson Correlation	0.298	0.367*	0.287	−0.371*	0.373*	1	0.341	−0.152
Significant (two-tailed)	0.109	0.046	0.124	0.043	0.043		0.065	0.424
n	30	30	30	30	30	30	30	30
Length of tube
Pearson Correlation	0.526**	0.631**	0.462*	−0.264	0.061	0.341	1	−0.225
Significant (two-tailed)	0.003	0.000	0.010	0.158	0.748	0.065		0.231
n	30	30	30	30	30	30	30	30
Outcome
Pearson Correlation	−0.425*	−0.486**	−0.601**	0.408*	−0.176	−0.152	−0.225	1
Significant (two-tailed)	0.019	0.006	0.000	0.025	0.351	0.424	0.231
n	30	30	30	30	30	30	30	30

*Correlation is significant at the 0.05 level (two-tailed), **Correlation is significant at the 0.01 level (two-tailed). LOS=Length of stay, ICU=Intensive care units, PEEP=Positive end-expiratory pressure