Table 2.
Primary and secondary outcome variables and results (N = 46; all assessed at birth unless otherwise stated).
| Primary outcome | ||
|---|---|---|
| Feasibility | ||
| Recruitment rate (number recruited/number screened, %) | 46/101 | 46% |
| Intervention retention rates (number completing follow-up at 12-week postpartum/number recruited, %) | 19/46 | 41% |
| CO sample rate (actual COs completed/total possible CO's, %) | 2,030/3,545 | 57% |
| Number of counseling sessions completed (Mdn, range) | 1 | 0–10 |
| Women using NRT (reported >1 week use, %) | 32/46 | 70% |
| Adherence to NRT (number who requested NRT after initial supply, %) | 29/46 | 63% |
| Partners/household members receiving NRT (number, %) | 10/46 | 22% |
| Secondary outcomes | ||
| Changes in tobacco smoking | ||
| Number of verified abstinent days ( ≤ 5 ppm; actual number of days/total possible number of days, %) | 1,566/3,545 | 44% |
| Self-reported 7-day point prevalence verified by CO at birth ≤ 5 ppm (N%) | 15 | 33% |
| Self-reported reduction in the number of cigarettes smoked/day in past 7-day baseline to last contact (M, p-value) | 13 vs. 3 | < 0.001 |
| Changes in the management of smoke-free homes (number positive vs. negative vs. no change, p-value) | 14 vs. 1 vs. 13 | < 0.01 |
| Changes in the management of smoke-free vehicles (number positive vs. negative vs. no change, p-value) | 18 vs. 1 vs. 9 | < 0.01 |
| Treatment acceptability (N = 23)a | Mdn | IQR |
| Ease of participation | 7 | (6–10) |
| Intervention helpfulness | 8 | (7–10) |
| Convenience of taking part | 8 | (7–9) |
| Opinion of using CO meter | 6 | (5–9) |
| Opinion of earning financial incentives | 10 | (5–10) |
| Effectiveness of incentives | 8 | (5–10) |
| Effectiveness of telephone-based support | 7 | (4–10) |
| Effectiveness of NRT | 9 | (7–10) |
| Fairness of a government-funded service using incentives to aid smoking cessation | 8 | (7–10) |
aRated using a 10-point visual analog scale with scores >5 considered favorable.