Table 4. Measures of diagnostic accuracy obtained by latent class analysis, with random effects, adjusted from the specific defining characteristics of the ineffective breathing pattern and impaired spontaneous ventilation diagnoses. Porto Alegre, RS, Brazil, 2016.

Defining characteristics	Se*	95% CI †		Sp ‡	95% CI †
1. IBP §
Drumming of fingers	0.022	0.010	0.059	0.987	0.808	0.998
Fatigue	0.407	0.358	0.459	0.703	0.648	0.752
Cyanosis of the skin, lips or extremities	0.161	0.127	0.208	0.952	0.921	0.970
Use of three-point position	0.106	0.076	0.148	0.977	0.950	0.989
Increase in anterior-posterior chest diameter	0.048	0.030	0.081	0.965	0.927	0.981
Altered chest excursion	0.003	0.000	0.995	1.000	1.000	1.000
Prolonged expiration phase	0.081	0.056	0.118	0.895	0.853	0.924
Abnormal breathing pattern	0.692	0.638	0.736	0.413	0.361	0.462
Alterations in tidal volume	0.617	0.564	0.671	0.895	0.852	0.926
Altered ventilation/perfusion ratio	0.416	0.365	0.479	0.842	0.791	0.876
Hypoxia	0.274	0.225	0.334	0.908	0.868	0.932
Decrease in inspiratory pressure	1.000	1.000	1.000	1.000	1.000	1.000
Decrease in expiratory pressure	0.996	0.000	0.999	1.000	1.000	1.000
Prevalence	49.4%		G 2|| : 653.5	DF ¶ : 599		p**=0.061
2. ISV ††
Cyanosis of the skin, lips or extremities	0.216	0.158	0.283	0.963	0.917	0.982
Apprehensiveness	0.182	0.136	0.244	0.889	0.846	0.920
Altered arterial blood gases	0.858	0.737	0.917	0.775	0.629	0.865
Hypoxia	0.365	0.291	0.444	0.926	0.879	0.954
Decrease in SaO2 ‡‡	0.681	0.520	0.797	0.993	0.001	0.999
Prevalence	37.2%		G 2 : 29.6	DF: 20		P=0.077

*Sensitivity; †95% Confidence Interval; ‡Specificity; §Ineffective breathing pattern; ||G2 Statistic of the likelihood ratio; ¶Degrees of freedom; **Level of significance; ††Impaired spontaneous ventilation; ‡‡Arterial oxygen saturation