Table 1.
Characteristics of included studies
| Author | Nigella sativa group | Control group | Jadad score | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number | Age [years] | Female (n) | Body mass index [kg/m2] | Methods | Number | Age [years] | Female (n) | Body mass index [kg/m2] | Methods | ||
| Salem 2017 | 26 | 37.5 ±12.7 | 18 | 30.6 ±8.8 | 1 g/day of Nigella sativa, for 3 months | 24 | 37.1 ±11.2 | 15 | 30.1 ±6.0 | Placebo | 4 |
| Koshak 2017 | 40 | 39 ±13 | 25 | 28 ±5 | Nigella sativa oil capsules 500 mg twice daily for 4 weeks | 40 | 42 ±15 | 22 | 30 ±8 | Placebo | 4 |
| Barlianto 2017 | 14 | 8.79 ±2.940 | 9 | – | Nigella sativa oil 15–30 mg/kg/day for 8 weeks | 14 | 8.71 ±3.771 | 8 | – | Placebo | 3 |
| Boskabady 2007 | 15 | – | – | – | 15 ml/kg of 0.1 g% boiled extract of Nigella sativa for 3 months | 14 | – | – | – | Placebo | 3 |