Table 2.

Decrease (%) in cancer diagnostic tests – results of multivariate analysis

	Coefficient	95% CI
Period
January–February	Ref
March	− 18.4	− 53.3; 16.5
April	− 28.4	− 64.5; 7.6
May	− 27.6	− 63.2; 7.9
June–October	− 9.6	− 45.3; 26.1
Geographic area
North America	Ref
Europe	0.0	− 32.7; 32.7
South America	8.1	− 5.8; 22.1
Setting of studies
Clinic based	Ref
Population based	11.6	− 12.0; 35.3

CI Confidence interval, Ref Reference category