TABLE 3.
Subgroup analysis: baseline to day 7 post quit date ‘within‐participant’ differences in indicators of smoking intensity in pregnant smokers by smoking status at day 7 post quit date.
| Reported smoking abstinence and no detectable saliva anabasine at follow‐up | ||||
|---|---|---|---|---|
| Baseline mean (SD) | Day 7 post quit date mean (SD) | Mean difference (95% CI) | P‐value | |
|
Saliva cotinine (ng/ml) (n = 8) |
129.29 (60.91) |
100.99 (70.07) |
−28.30 (−122.27, 65.68) | 0.500 |
| Exhaled air carbon monoxide a (p.p.m.) (n = 5) | 9.49 | 1.14 | 0.20 (0.07, 0.57) | 0.013 |
| Reported continued smoking and/or detectable saliva anabasine at follow‐up | ||||
|---|---|---|---|---|
| Baseline mean (SD) | Day 7 post quit date mean (SD) | Mean difference (95% CI) | P‐value | |
|
Saliva cotinine (ng/ml) (n = 12) |
174.71 (70.66) |
139.73 (72.05) |
−34.98 (−63.75, −6.22) |
0.022 |
|
Exhaled air carbon monoxide a (p.p.m.) (n = 8) |
12.97 | 8.04 |
0.65 (0.37, 1.13) |
0.102 |
|
Number of cigarettes smoked per day b (n = 12) |
9 (4.02) |
4 (3.03) |
−5 (−7.57, −3.26) |
0.002 c |
Paired t‐tests were used to compare differences between baseline and day 7 post quit date means. SD = standard deviation; CI = confidence interval; p.p.m. = parts per million.
Back‐transformed exhaled carbon monoxide data. Means represent geometric means. Mean differences presented as ratio of geometric means;
data have been rounded to the nearest cigarette;
sensitivity analysis confirmed this finding.