Table 4
Effects of Increased Fiber Intake on Changes in Fasting Insulin Concentrations
| Meta-analysis Authors and Date | No. of Studies in Meta-analysis | No. of Participants in Meta-analysis | Fiber Type and Dose/Day | Mean Duration in Weeks | Reduction in Insulin Concentrations in pmol/L | Q Test P Value and I2 Statistic | Egger or Begg Test P Value | Quality Assessment and Outcome |
|---|---|---|---|---|---|---|---|---|
| Bao et al, 201426 | 9 | 496 | β-Glucan 5.5 g | 8 | ↓ 6.3, P < .05 | NS, 0% | NS | Jadad scale 6/9 high quality |
| Zou et al, 201528 | 6 | 283 | β-Glucan 3.5 g | 6 | ↓ 0.8, NS | NS, 0% | NS | Jadad scale 4/6 high quality |
| He et al, 201631 | 10 | 597 | β-Glucan 5 g | 8 | ↓ 6.3, P < .05 | P < .001, 98% | ||
| Liu et al, 201633 | 13 | 432 | Fructans 13 g | 7 | ↓ 0.7, NS | P < .001, 88% | P < .05 | Cochrane 4/13 high quality |