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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

From: A randomised controlled trial of a smoking cessation intervention delivered by dental hygienists: a feasibility study

 

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%)

  1. Carbon monoxide (CO) quitter: <8 ppm, Cotinine (COT) quitter: <20 ng/ml
  2. *COT >20 ng/ml but evidence of NRT use at time of sampling
  3. **COT >20 ng/ml but CO <<8 ppm
  4. self reported quitter but cotinine level above cut-offs (373 ng/ml and 385 ng/ml)
  5. self reported quitter but did not return biochemical sample