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Evidence found and GRADE certainty

469 questions · 483 findings · 63 reviews

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No studies found 117 · 24.2%GRADE not reported 13 · 2.7%Very low 68 · 14.1%Low 141 · 29.2%Moderate 112 · 23.2%High 32 · 6.6%

Active NRT vs placebo ‐ rs1051730 ‐ non‐Hispanic white

Abstinence at end of treatment ‐ homozygous major · people who smoke

Active NRT showed no clear difference in abstinence at end of treatment ‐ homozygous major compared with placebo ‐ rs1051730 ‐ non‐Hispanic white (low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ rs2036527 ‐ non‐Hispanic black or African American

6‐Month abstinence ‐ homozygous major · people who smoke

It is very uncertain whether active NRT changes 6‐Month abstinence ‐ homozygous major compared with placebo ‐ rs2036527 ‐ non‐Hispanic black or African American (very low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ rs2036527 ‐ non‐Hispanic black or African American

6‐Month abstinence ‐ heterozygous or homozygous minor · people who smoke

Active NRT showed no clear difference in 6‐Month abstinence ‐ heterozygous or homozygous minor compared with placebo ‐ rs2036527 ‐ non‐Hispanic black or African American (moderate certainty).

1 finding from 1 review

Active NRT vs placebo ‐ rs2036527 ‐ non‐Hispanic black or African American

End of treatment ‐ homozygous major · people who smoke

Active NRT showed no clear difference in end of treatment ‐ homozygous major compared with placebo ‐ rs2036527 ‐ non‐Hispanic black or African American (low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ rs2036527 ‐ non‐Hispanic black or African American

End of treatment ‐ heterozygous or homozygous minor · people who smoke

Active NRT showed no clear difference in end of treatment ‐ heterozygous or homozygous minor compared with placebo ‐ rs2036527 ‐ non‐Hispanic black or African American (moderate certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

6‐Month abstinence ‐ homozygous major · people who smoke

It is very uncertain whether active NRT changes 6‐month abstinence ‐ homozygous major compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (very low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

6‐Month abstinence ‐ heterozygous · people who smoke

Active NRT showed no clear difference in 6‐Month abstinence ‐ heterozygous compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

6‐Month abstinence ‐ homozygous minor · people who smoke

It is very uncertain whether active NRT changes 6‐Month abstinence ‐ homozygous minor compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (very low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ rs1051730 ‐ non‐Hispanic white

Abstinence at end of treatment ‐ heterozygous · people who smoke

Active NRT probably leads to higher abstinence at end of treatment ‐ heterozygous compared with placebo ‐ rs1051730 ‐ non‐Hispanic white (moderate certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

End of treatment ‐ homozygous major · people who smoke

It is very uncertain whether active NRT changes end of treatment ‐ homozygous major compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (very low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

End of treatment ‐ heterozygous · people who smoke

It is very uncertain whether active NRT changes end of treatment ‐ heterozygous compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (very low certainty).

1 finding from 1 review

Active NRT vs placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white

End of treatment ‐ homozygous minor · people who smoke

Active NRT showed no clear difference in end of treatment ‐ homozygous minor compared with placebo ‐ DRD4 (exon 3 48 bp) ‐ non‐Hispanic white (low certainty).

1 finding from 1 review