Table 1

Costing for screening using the Leeds protocol

Leeds protocol (QFT first), 280 immigrants
Step 1: QFT
		Unit cost	Total cost
	280 QFT	£25.67	£7187.60
	6 patients had second QFT	£25.67	£154.02
Step 2: CXR if QFT positive (37%) + 1 patient with 2 indeterminate QFT
	105 CXR	£23.24	£2440.20
Total cost for screening			£9781.82
LTBI cases			105
Cost per case LTBI identified			£93.16

CXR, chest x ray; LTBI, latent tuberculosis infection; QFT, QuantiFERON-TB Gold.