Table 2.

Sensitivity, specificity, and likelihood ratios for each symptom

	Common Cold	Not‐Common Cold	Sensitivity	Specificity	LH+	LH−	P value
	(n = 32)	(n = 30)
MSTI	24	10	75%	67%	2.3	0.38	<.001
Fever	16	9	50%	70%	1.7	0.71	.110
Cough	22	9	69%	73%	2.6	0.43	.002
Rhinorrhea	22	7	69%	83%	4.1	0.38	<.001
Sore throat	18	2	56%	93%	8.4	0.47	<.001
Sputum	11	1	34%	97%	10.0	0.68	.002
Headache	6	2	19%	93%	2.8	0.87	.016

Chi‐square tests were used to compare differences in the proportion of common and not‐common cold groups.

Abbreviations: LH+, positive likelihood ratios; LH−, negative likelihood ratios; MSTI, mild short‐term insomnia.