Table 1 Characteristics of included studies (n = 4)
Study | Year | Region | Period | Study design | N | Age(Intervention/control) | Smoking status(/d) | Dosage(mg/d) | Infant age(months) | Gestational age, median (weeks) |
|---|---|---|---|---|---|---|---|---|---|---|
Cindy T. McEvoy | 2014 | USA | 2007.03-2011.01 | RCT | 159 | 26.6 ± 6.2/25.5 ± 5.5 | ≥ 1 | 500 | 0 | 39.0 ± 2.93/39.1 ± 2.7 |
Cindy T. McEvoy | 2018 | USA | 2012.12-2015.06 | RCT | 222 | 26.6 ± 5.2/26.4 ± 5.9 | 7.0/7.5 | 500 | 3 | 38.7 ± 1.8/38.6 ± 1.7 |
Cindy T. McEvoy | 2020 | USA | 2012–2016 | RCT | 214 | 26.6 ± 5.3/26.4 ± 5.9 | 7.0/7.5 | 500 | 12 | 38.7 ± 1.8/38.6 ± 1.7 |
Cindy T. McEvoy | 2022 | USA | 2018–2021 | RCT | 192 | 26.5 ± 5.3/26.7 ± 5.9 | 7.5/8 | 500 | 60 | 38.7 ± 1.9/38.6 ± 1.7 |