Table 2.

Cross table for the association between gender, WBCs, RBCs and Platelets categories and test result.

	N	Negative	Positive	Test Statistic	Odds Ratio
		(N=831)	(N=123)
Gender: Male	962	0.4 322/831	0.6 76/123	21=23.39, P<0.012	2.56(1.73-3.77)
WBC classification*	962			22=0.04, P=0.982
Leukocytopenia		0.1 44/831	0.0 6/123
Normal WBCs		0.9 759/831	0.9 113/123
Leucocytosis		0.0 28/831	0.0 4/123
RBCs Classification**	962			22=1.29, P=0.522
Erythrocytopenia		0.2 148/831	0.1 18/123
Normal RBCs Count		0.8 649/831	0.8 98/123
Erythrocytosis		0.0 34/831	0.1 7/123
Hgb Classification***	962			22=0.60, P=0.742
Anaemia		0.3 227/831	0.3 34/123
Normal Haemoglobin		0.7 600/831	0.7 89/123
Polycythaemia		0.0 4/831	0.0 0/123
Platelet Classification****	962			22=0.45, P=0.802
Thrombocytopenia		0.0 14/831	0.0 2/123
Normal Platelet Count		0.9 775/831	0.9 113/123
Thrombocytosis		0.1 42/831	0.1 8/123

^*WBCs count of 4,000 to11,000 was considered normal.

**Male RBC normal ranges were 4.7 to 6.1 million cells per microliter (cells/mcL) and for females 4.2 to 5.4 million cells/mcL.

^***The normal range for haemoglobin is: For men, 13.5 to 17.5 grams per decilitre. For women, 12.0 to 15.5 grams per decilitre.

^****A normal platelet count ranges from 150,000 to 450,000 platelets per microliter of blood. N is the number of nonmissing value. 1Kruskal-Wallis. 2Pearson. 3Wilcoxon. Patients with less red blood cell count (RBCs), haemoglobin values (Hgb) and haematocrit value (HCt) were less likely to have a positive PCR test results in our sample of patients attending primary care settings and suspected diagnosis of COVID-19 infection, RBCs t(470) = -3.20, p<.01, Hgb t(470) = -2.77, p<.01 and HCt % t(470) = -3.07, p<.01 (Table 3).