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. 2020 Oct 23;20:264. doi: 10.1186/s12874-020-01145-1

Table 1.

Search strategy for the study

# Results
1 ((heterogen$ and effect$) or (effect and modif$)).tw.
2 regression.tw.
3 treatment$.tw.
4 (treatment adj1 effect$).tw.
5 (treatment adj1 difference$).tw.
6 exp risk/ or risk.tw.
7 3 or 4 or 5 or 6
8 *Models, Statistical/
9 *Randomized Controlled Trials as Topic/mt
10 Multicenter Studies as Topic/mt
11 *Randomized Controlled Trials as Topic/sn
12 Multicenter Studies as Topic/sn
13 *Clinical Trials as Topic/sn
14 *Precision Medicine/mt
15 or/8–14
16 1 and 2
17 2 and 7
18 15 and 17
19 15 and 16
20 18 or 19