Table 3.
Summary effect sizes and homogeneity statistics (random effects assumptions) at the final post-intervention assessment for smoking abstinence and quit attempts.
| Analyses | Outcome | ka | ORb (95% CIc) | Qd | P Value | I 2e (95% CI) |
| Intent-to-Treat | ||||||
|
|
Point prevalence, 24 hours | 2 | 2.60 (1.26, 5.37) | 0.14 | .704 | 0 (0, 100) |
|
|
Point prevalence, 7 days | 16 | 1.38 (1.22, 1.55) | 18.34 | .245 | 18 (0, 55) |
|
|
Point prevalence, 30 days | 9 | 1.52 (1.34, 1.71) | 5.72 | .678 | 0 (0, 63) |
|
|
Continuous abstinence | 7 | 1.63 (1.19, 2.24) | 11.31 | .079 | 47 (0, 78) |
|
|
Prolonged abstinence | 3 | 1.57 (1.19, 2.08) | 0.80 | .671 | 0 (0, 89) |
|
|
Repeated point prevalence | 3 | 2.33 (1.61, 3.38) | 1.52 | .467 | 0 (0, 58) |
|
|
Quit attempt | 5 | 1.15 (0.84, 1.57) | 4.35 | .360 | 8 (0, 47) |
| Complete case | ||||||
|
|
Point prevalence, 24 hours | 2 | 3.62 (1.46, 8.99) | 0.02 | .895 | 0 (0, 100) |
|
|
Point prevalence, 7 days | 15 | 1.43 (1.31, 1.56) | 13.55 | .484 | 0 (0, 0) |
|
|
Point prevalence, 30 days | 9 | 1.57 (1.39, 1.77) | 7.47 | .487 | 0 (0, 100) |
|
|
Continuous abstinence | 7 | 1.92 (1.55, 2.38) | 6.88 | .332 | 13 (0, 56) |
|
|
Prolonged abstinence | 3 | 1.57 (1.19, 2.07) | 0.45 | .798 | 0 (0, 95) |
|
|
Repeated point prevalence | 3 | 2.33 (1.60, 3.39) | 1.41 | .495 | 0 (0, 57) |
|
|
Quit attempt | 5 | 1.33 (0.83, 2.13) | 4.72 | .317 | 15 (0, 60) |
aNumber of interventions
bOdds ratios; greater than 1 indicate that the estimated effects favor the text messaging interventions relative to controls.
cconfidence interval.
dHomogeneity statistic.
eConsistency of effect sizes.