Risk factors for a positive SARS-CoV-2 PCR in patients with common cold symptoms in a primary care setting – a retrospective analysis based on a joint documentation standard

Table 3 Logistic regression model: factors influencing positive CovPCR

Variable	COVID-19 negative (n = 330) n (%)	COVID-19 positive (n = 40) n (%)	Adjusted OR (95% CI)	P-value
First grade contact (has symptoms)	58 (17.5)	14 (35.0)	5.16 (1.72–15.51)	0.002
First grade contact (has no symptoms)	27 (11.2)	13 (32.5)	12.55 (3.97–39.67)	< 0.001
Free capacity/other	125 (37.9)	7 (17.5)	1.50 (0.46–4.87)	0,497
age^a	46,4 (19.7)	52,4 (23.5)	1.02 (1.00–1.04)	0,019
GP expects positive result	97 (29.4)	20 (50.0)	1.98 (0.90–4.38)	0.092
chills	20 (6.1)	5 (12.5)	2.80 (0.83–9.43)	0.117
Anosmia	22 (6.7)	7 (17.5)	4.54 (1.51–13.67)	0.011
sore throat	118 (35.8)	5 (12.5)	0.33 (0.11–0.97)	0.029

OR Odds ratio, CI Confidence intervals. Patients with missing age (n = 4) were excluded
^amean value (standard deviation); Nagelkerke R² 0.265

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