Table 2.

Mean total cost per household

	Intervention (SD) (n = 102)	Usual Care (SD) (n = 102)	Difference (95% CI)
Staff	£29 (£8)	£11 (£3)	£18 (£16 to £19)
Feedback	£15 (£2.70)	–	£15 (£14.65 to £15.70)
Telephone	£10 (£4)	£0.10 (£0)	£10 (£8.80 to £10.40)
Travel	£216 (£143)	£32 (£20)	£184 (£156 to £213)
NRT	£56 (£47)	–	£56 (£47 to £65)
Air monitor	£1.68 (£0.32)	–	£1.68 (£1.62 to £1.74)
Support pack	–	£1.45 (£0)	£1.45 (£1.45 to £1.45)
Total	£328 (£151)	£45 (£20)	£283* (£254 to £313)

*Statistically significant (p-value< 0.001)