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Table 4 Summary of imputation results for urine-verified abstinence assuming different levels of association between missing and abstinence

From: Analysis of self-report and biochemically verified tobacco abstinence outcomes with missing data: a sensitivity analysis using two-stage imputation

   Counseling vs. no counseling Multiple vs. single contests
OR 1 OR 2 Counseling
Tx2 + Tx4
No counseling
Tx1 + Tx3
Estimated treatment effect (odds ratio for abstinence) P-value Multiple contests
Tx3 + Tx4
Single contest
Tx1 + Tx2
Estimated treatment effect (odds ratio for abstinence) P-value
1 1 25.8% 20.9% 1.31 .046 24.8% 21.8% 1.18 .212
2 24.8% 20.1% 1.32 .046 23.9% 20.9% 1.19 .204
3 24.1% 19.4% 1.32 .047 23.3% 20.2% 1.20 .200
4 23.6% 18.9% 1.32 .047 22.7% 19.7% 1.20 .197
5 23.1% 18.5% 1.32 .047 22.2% 19.2% 1.20 .195
+∞ 18.1% 14.1% 1.35 .058 17.4% 14.8% 1.22 .209
2 1 23.3% 19.5% 1.26 .102 22.7% 20.0% 1.18 .249
2 22.5% 18.7% 1.26 .101 21.9% 19.2% 1.18 .241
3 21.9% 18.1% 1.27 .100 21.3% 18.6% 1.19 .236
4 21.3% 17.6% 1.27 .100 20.8% 18.1% 1.19 .233
5 20.9% 17.2% 1.27 .100 20.4% 17.7% 1.19 .231
+∞ 16.4% 13.1% 1.30 .109 15.9% 13.6% 1.21 .244
3 1 22.3% 18.9% 1.23 .143 21.9% 19.3% 1.17 .272
2 21.5% 18.2% 1.24 .140 21.1% 18.5% 1.17 .264
3 20.9% 17.6% 1.24 .139 20.5% 17.9% 1.18 .258
4 20.4% 17.1% 1.24 .137 20.0% 17.4% 1.18 .255
5 20.0% 16.7% 1.25 .137 19.6% 17.0% 1.19 .253
+∞ 15.7% 12.8% 1.27 .143 15.3% 13.1% 1.20 .264
4 1 21.8% 18.6% 1.22 .171 21.4% 18.9% 1.16 .287
2 21.0% 17.9% 1.22 .168 20.6% 18.2% 1.17 .278
3 20.4% 17.3% 1.23 .165 20.0% 17.6% 1.17 .272
4 19.9% 16.8% 1.23 .164 19.6% 17.1% 1.18 .269
5 19.5% 16.4% 1.23 .163 19.2% 16.7% 1.18 .266
+∞ 15.3% 12.6% 1.26 .166 15.0% 12.8% 1.20 .277
5 1 21.4% 18.4% 1.21 .192 21.1% 18.7% 1.16 .297
2 20.7% 17.7% 1.21 .188 20.3% 17.9% 1.17 .288
3 20.1% 17.1% 1.22 .185 19.8% 17.4% 1.17 .282
4 19.6% 16.6% 1.22 .183 19.3% 16.9% 1.18 .279
5 19.2% 16.3% 1.22 .181 18.9% 16.5% 1.18 .276
+∞ 15.1% 12.4% 1.25 .183 14.8% 12.7% 1.20 .285
+∞ 1 19.8% 17.6% 1.16 .315 19.7% 17.7% 1.15 .352
2 19.1% 16.9% 1.17 .306 19.0% 16.9% 1.15 .342
3 18.6% 16.3% 1.17 .300 18.5% 16.4% 1.16 .335
4 18.1% 15.9% 1.17 .295 18.0% 15.9% 1.16 .331
5 17.8% 15.5% 1.18 .292 17.7% 15.6% 1.16 .328
+∞ 14.0% 11.9% 1.20 .278 13.8% 12.0% 1.18 .333
  1. OR1: odds ratio between missing and tobacco use status for self-report data; OR2: odds ratio between urine missing and urine-verified failure among those who self-reported abstinence; Tx1: single contest + no counseling; Tx2: single contest + counseling; Tx3: multiple contests + no counseling; Tx4: multiple contests + counseling. P-values are based on the Chi-square test