The use of Cincinnati prehospital stroke scale during telephone dispatch interview increases the accuracy in identifying stroke and transient ischemic attack symptoms

Table 3 Linear models

a. Positive predictive value as function of sensitivity and proportion of cases with CPSS reported
	Coefficient	Standard error (*)	p	95% CI
Sensitivity	-0.36	0.192	0.063	-0.73-0.02
Proportion of cases with CPSS	0.48	0.195	0.014	0.10-0.86
Constant	67.11	23.137	0.004	21.76-112.46
b. Sensitivity as function of positive predictive value and proportion of cases with CPSS reported
	Coefficient	*Standard error ()**	p	95% CI
Positive predictive value	-0.21	0.138	0.118	-0.48-0.05
Proportion of cases with CPSS	0.32	0.104	0.002	0.12-0.53
Constant	69.32	12.15	0.000	45.50-93.13

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