Table 1

Univariate Logistic Regression of the Association Between Signs, Symptoms, C-Reactive Protein (CRP), and Erythrocyte Sedimentation Rate (ESR) With Antral Puncture Revealing Purulent or Mucopurulent Fluid

Finding	OR (95% CI)	P Value
Symptoms
Preceding upper respiratory tract infection^a,^b	2.09 (0.90–4.86)	.088
Maxillary toothache^a	1.99 (1.06–3.72)	.031
Maxillary pain
Any	0.42 (0.08–2.22)	.307
Unilateral^a,^b	1.66 (0.91–3.03)	.099
Bilateral	0.53 (0.29–0.97)	.040
Cacosmia	1.37 (0.75–2.49)	.309
Anosmia^b	1.23 (0.67–2.27)	.500
Cough	1.23 (0.66–2.30)	.516
Nasal congestion	1.03 (0.50–2.14)	.929
Pain bending forward	0.86 (0.43–1.73)	.681
Previous diagnosis of sinusitis	0.43 (0.22–0.84)	.014
Signs
Purulent nasal discharge^a,^b	1.52 (0.77–2.99)	.226
Tenderness of maxillary sinus
Any^a,^b	1.93 (0.97–3.85)	.063
Unilateral^a,^b	2.19 (0.18–4.08)	.013
Bilateral	0.76 (0.40–1.43)	.391
Tender tapping on teeth	1.30 (0.69–2.44)	.415
Purulent pharyngeal discharge	1.30 (0.61–2.73)	.497
Swollen inflamed turbinate	1.01 (0.54–1.91)	.966
Edema over maxillary sinus
Any	0.64 (0.34–1.20)	.165
Unilateral	0.78 (0.39–1.57)	.486
Bilateral	0.48 (0.15–1.49)	.203
Laboratory tests
C-reactive protein
>10 mg/L	4.29 (2.27–8.11)	<.001
>15 mg/L^a,^b	4.75 (2.50–9.02)	<.001
>20 mg/L	3.92 (2.02–7.61)	<.001
Erythrocyte sedimentation rate
>10 mm/h	3.30 (1.77–6.15)	<.001
>20 mm/h	3.81 (1.92–7.53)	<.001

OR=odds ratio.
Note: This analysis was also performed for abnormal CT finding and positive bacterial cultures as the reference standard; data available on request from the author.
↵a Included in initial models for abnormal finding on antral puncture and positive bacterial culture as the reference standard.
↵b Included in the initial model for abnormal computed tomographic finding as the reference standard.