Table 2 Average costs of screening invitation and offer.

	Number of individuals	Average cost, £ (95% CI)*
NHS cost per individual screening invitation†	19 773	13.55 (13.15 to 14.33)
NHS cost per accepted screening offer‡	4731	20.65 (19.87 to 23.69)
Patient cost§	411	6.82 (5.48 to 10.22)
Total cost per screening invitation	19 773	20.37 (18.94 to 24.83)
Total cost per accepted screening offer	4731	27.47 (23.24 to 29.55)

NHS, National Health Service.

*Costs inflated to UK£ 2005.

†Includes, from table 1, A+B+C+D+E+F÷19 773 patients invited.

‡Includes, from table 1, ((A÷19773)*4731+B+C+D+E+(F÷19773)*4731)÷4731.

§411 from 479 people invited completed patient cost questionnaires.