Table 5.
Stratification meta-analysis according to the type of stevia extract for the DPPH assay.
| Assay | Type of Extract | Effect Size | CI 95% | Number of Studies |
|---|---|---|---|---|
| DPPH % RSA | Aqueous | 73.09 | 49.55, 96.63 | 4 |
| Hydroalcoholic | 72.31 | 52.96, 91.67 | 4 | |
| Organic | 55.84 | 48.85, 62.83 | 21 | |
| Glycosides | 67.23 | 65.27, 69.19 | 1 | |
| DPPH mg/g, all units | Aqueous | 92.80 | 69.46, 116.14 | 11 |
| Hydroalcoholic | 46.27 | 25.45, 67.10 | 10 | |
| Organic | 8.47 | 0.15, 18.46 | 2 | |
| DPPH mg TE/g | Aqueous | 92.80 | 69.46, 12.14 | 11 |
| Hydroalcoholic | 67.96 | 44.93, 90.99 | 5 | |
| Organic | nr* | |||
| DPPPH mg AAE/g | Aqueous | nr* | ||
| Hydroalcoholic | 14.25 | 14.05, 14.45 | 3 | |
| Organic | 8.47 | 0.15, 18.46 | 2 | |
| DPPH mg RUE/g | Aqueous | nr* | ||
| Hydroalcoholic | 40.10 | 24.57, 55.63 | 2 | |
| Organic | nr* |
nr*: not reported; CI 95%: 95% confidence interval; RSA: radical scavenging activity; TE: Trolox equivalent; AAE: ascorbic acid equivalent; RUE: rutin equivalent; Hydroalcoholic: a solvent mixture of water and alcohol.