Table 1– Proportion of high and low tuberculosis (TB) burden primary care organisations (PCOs) that undertake further screening action in new entrants issued with different port notifications or referred from primary care

	Low-TB burden PCO	High-TB burden PCO	OR (95% CI)	p-value
Total PCOs n	135	42
Method of referral
CXR abnormal^#	135 (100)	42 (100)	NA	NA
CXR inconclusive/has not been undertaken^¶	108 (80.0)	26 (61.9)	0.41 (0.19–0.86)	0.019
CXR normal⁺	84 (62.2)	12 (28.6)	0.24 (0.11–0.52)	<0.0001
Primary care	52 (38.5)	10 (23.8)	0.50 (0.23–1.1)	0.08

Data are presented as n (%), unless otherwise stated. CXR: chest radiography; NA: not applicable. ^#: CXR abnormal (port form 103); ^¶: CXR inconclusive/has not been undertaken (port form 102); ⁺: CXR normal (port form 101).