Table 6.

Delay in primary care: univariate analysis

Variable	Late referral ≥6 days
	Odds ratio	95% CI	P-value
Age >65 years	1.24	0.60 to 2.55	0.57
Male sex	1.26	0.61 to 2.60	0.53
Comorbidity	3.06	1.47 to 6.38	0.00a
Symptoms
Dyspnoea	2.34	0.79 to 6.94	0.13a
Chest pain	0.42	0.20 to 0.87	0.02a
Cough	2.06	0.98 to 4.29	0.06a
Haemoptysisb	–	–	–
Fever	0.73	0.24 to 2.21	0.58
Calf pain	0.42	0.16 to 1.13	0.09a
Signs
Tachycardiac	1.17	0.54 to 2.54	0.69
Rales	0.43	0.12 to 1.46	0.18a
Decreased breath sounds	1.24	0.40 to 3.25	0.71
Signs of DVT	0.64	0.25 to 1.63	0.35
Risk factors
Previous DVT/PE	0.94	0.37 to 2.42	0.90
Known malignancy	0.75	0.21 to 2.62	0.65
Surgery or traumad	0.21	0.03 to 1.57	0.13a
Thrombophiliab	–	–	–

^aP≤0.20, therefore data included in multivariate logistic regression analysis.

^bNo analysis due to lack of data.

^cDefined as heart rate >100 beats per minute.

^dSurgery or trauma in the previous 4 weeks.

DVT = deep venous thrombosis. PE = pulmonary embolism.