Table 2 Comparison between review results for nicotine patch in 1994 and 2000
Review year | 1994 | 2000 | |
|---|---|---|---|
a) All trials | No. of trials | 9 | 30 |
Odds ratio | 2.07 | 1.73 | |
95% CI | 1.64–2.62 | 1.56–1.93 | |
Χ2 & p for heterogeneity | 7.08 (p = 0.53) | 41.75(p = 075) | |
b) Level of support sub group: | No. of trials | 4 | 12 |
-Low intensity | Odds ratio | 2.52 | 1.74 |
95% CI | 1.64–3.87 | 1.48–2.04 | |
Χ2 & p for heterogeneity | 4.84(p = 0.18) | 18.69(p = 0.096) | |
-High intensity | No. of trials | 5 | 18 |
Odds ratio | 1.99 | 1.73 | |
95% CI | 1.49–2.64 | 1.51–1.99 | |
Χ2 & p for heterogeneity | 2.55 (p = 0.64) | 23.06 (p = 0.15) | |
c) Length of follow-up subgroups: | No. of trials | 3 | 11 |
-6 months | Odds ratio | 1.96 | 1.96 |
95% CI | 1.44–2.66 | 1.65–2.34 | |
Χ2 & p for heterogeneity | 1.74(p = 0.72) | 8.06 (p = 0.62) | |
-12 months | No. of trials | 6 | 19 |
Odds ratio | 2.09 | 1.62 | |
95% CI | 1.39–3.12 | 1.42–1.84 | |
Χ2 & p for heterogeneity | 2.38 (p = 0.67) | 30.67 (p = 0.044) |