Table 2.
Descriptive statistics for the main continuous variables included in the meta-analysis (Mean values and standard deviations; medians and minimum and maximum values)
| Variables | n | Mean | sd | Median | Min | Max |
|---|---|---|---|---|---|---|
| Unscaled data | ||||||
| Dependent variables | ||||||
| Ca absorption (g/d) | 201 | 6·00 | 2·33 | 5·99 | 0·29 | 13·50 |
| Ca retention (g/d) | 201 | 5·33 | 2·37 | 5·22 | 0·24 | 13·26 |
| Independent variables | ||||||
| TCa (g/d) | 201 | 10·7 | 4·34 | 10·5 | 1·82 | 26·3 |
| TP (g/d) | 201 | 7·56 | 3·16 | 7·08 | 2·39 | 19·1 |
| PP (g/d) | 201 | 3·88 | 1·97 | 3·61 | 0·94 | 9·92 |
| NPP (g/d) | 201 | 3·68 | 2·08 | 3·13 | 0·76 | 14·4 |
| ExPhyt (phytase units/d) | 201 | 431 | 784 | 0·00 | 0·00 | 3858 |
| Data scaled by the initial BW | ||||||
| Dependent variables | ||||||
| Ca absorption (g/kg of BW per d) | 201 | 0·178 | 0·085 | 0·169 | 0·007 | 0·543 |
| Ca retention (g/kg of BW per d) | 201 | 0·158 | 0·080 | 0·153 | 0·006 | 0·533 |
| Independent variables | ||||||
| TCa (g/kg of BW per d) | 201 | 0·313 | 0·154 | 0·271 | 0·046 | 1·04 |
| TP (g/kg of BW per d) | 201 | 0·222 | 0·113 | 0·183 | 0·074 | 0·794 |
| PP (g/kg of BW per d) | 201 | 0·110 | 0·066 | 0·091 | 0·032 | 0·499 |
| NPP (g/kg of BW per d) | 201 | 0·111 | 0·069 | 0·094 | 0·023 | 0·367 |
| ExPhyt (phytase units/kg of BW per d) | 201 | 10·8 | 20·3 | 0·00 | 0·00 | 99·2 |
TCa, total Ca intake; TP, total P intake; PP, phytate-P intake; NPP, non-phytate-P intake; ExPhyt, exogenous phytase intake; BW, body weight.