Table 1.
Experimental studies: population age, biological gender, smoking status at baseline, number of participants, and intervention arms
| Author/year | Country | Age, y Mean (SD) | % Men | % cigarette smokers | % naive e-cig users | N | Cross-over study | Intervention arms |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cigarette | Nicotine e-cig | 0% nicotine e-cig | Placeb | ||||||||
|
| |||||||||||
| Cossio 2020 | United States | 24 (3) | 50% | 0% | 100% | 16 | X | X | X | X | |
| Biondi-Zoccai 2019 | Italy | 35 (13) | 30% | 100% | NR% | 20 | X | X | X | ||
| Kerr 2018 | United Kingdom | 31.6 (10.5) | 100% | 100% | 100% | 20 | X | X | X | ||
| Antoniewicz 2019 | Sweden | 26 (3) | 40% | 100% | NR | 17 | X | X | X | ||
| Chaumont 2018 | Belgium | 23 (0.4) | 72% | 100% | NR | 25 | X | X | X | X | |
| Franzen 2018 | Germany | 22.9 (3.5) | 33% | 100% | 0% | 15 | X | X | X | X | |
| Fogt 2016 | United States | 23.1 (2.5) | 50% | 0% | 100% | 20 | X | X | X | ||
| Vlachaupoulos, 2016 | Greece | 30 (8) | NR | 100% | NR | 24 | X | X | X | X | |
| Cooke 2015 | United States | 23 (1) | 50% | 0% | 100% | 20 | X | X | X | ||
| Yan 2015 | United States | 38.7(11) | 48% | 100% | 0% | 23 | X | X | X | ||
| Szolty 2014 | Poland | 23 (2) | 0% | 100% | 0% | 15 | X | X | |||
| Farsalinos 2014 | Greece | 35 (5) | 90% | 100% | NR | 76 | X | ||||
| Czogala 2012 | Poland | 34.9 (15.3) | 50% | 100% | 100% | 42 | X | X | |||