From: How effective are artificial nests in attracting bees? A review
 | Regression equation | R-Sq | P-value |  | r |
---|---|---|---|---|---|
Bee hotel | Â | Â | Â | Â | Â |
 | OR = − 132.4 + 49.49 DI − 4.434 DI^2 + 0.1196 DI^3 | 13.1% | 0.23 | LE | −0.2 |
 | OR= 61.33 − 5.206 LE + 0.3961 LE^2 − 0.01057 LE^3 | 5.7% | 0.60 | DI | −0.11 |
Nest box | Â | Â | Â | Â | Â |
 | OR = − 29.70 + 37.77 VO − 9.686 VO^2 + 0.7249 VO^3 | 25% | 0.53 | VO | 0.18 |
 | OR = 30.39 − 13.66 EN + 3.172 EN^2 −0.1928 EN^3 | 14.5% | 0.72 | EN | −0.11 |