Table 2.

Breakdown of number of participants followed-up and quitters at 3 and6 months and 1 year, as defined by self-report, carbon monoxide and salivary cotinine

	3 months		6 months		1 Year
	Intervention (n = 59)	Control (n = 57)	Intervention (n = 59)	Control (n = 57)	Intervention (n = 59)	Control (n = 57)
Number (%) followed up	52 (88.1%)	50 (87.7%)	36 (61.0%)	35 (61.4%)	33 (55.9%)	23 (40.4%)
Number (%) of self-reported quitters	9/59 (15.3%)	5/57 (8.8%)	6/59 (10.2%)	3/57 (5.3%)	7/59 (11.9%)	3/57 (5.3%)
Number (%) of quitters by Carbon Monoxide	9/59 (15.3%)	4/57 (7.0%) (1 missing value)	6/59 (10.2%)	2/57 (3.5%) (1 missing value)	na	na
Number (%) of quitters by Cotinine	6 + 1* + 2** (15.3%)	2 + 2* + 1** (8.8%)	5 + 1* (10.2%)	2 + 1* (5.3%)	4 + 1† + 2‡	2 + 1†
Quitters	9/59 (15.3%)	5/57 (8.8%)	6/59 (10.2%)	3/57 (5.3%)	4/59 (6.8%)	2/57 (3.5%)

Carbon monoxide (CO) quitter: <8 ppm, Cotinine (COT) quitter: <20 ng/ml

*COT >20 ng/ml but evidence of NRT use at time of sampling

**COT >20 ng/ml but CO <<8 ppm

^†self reported quitter but cotinine level above cut-offs (373 ng/ml and 385 ng/ml)

^‡self reported quitter but did not return biochemical sample