. 2020 Aug 19;98(9):skaa266. doi: 10.1093/jas/skaa266

Table 4.

Relationship between liver and sera retinol in various feeding phases

Phase¹	Day	β ₁ value	β ₂ value	R ² value	P-value
1²	Day −91 to 0	−0.00468	—	0.0438	0.059
2³	Day 0 to 112	0.00220	0.0001618	0.6821	<0.001
1 and 2⁴	Day −91 to 112	0.01586	—	0.3696	<0.001

¹Feeding phases required different models for the best fit.

² $L o g (l i v e r c o n t e n t d u r i n g d e p l e t i o n p e r i o d) = β_{0} + β_{1} s e r a + ε$

³ $L o g (l i v e r c o n t e n t d u r i n g r e p l e t i o n p e r i o d) = β_{0} + β_{1} s e r a + β_{2} t r e a t m e n t + ε$

⁴ $L o g (l i v e r c o n t e n t f o r 0 g r o u p o v e r b o t h p e r i o d s) = β_{0} + β_{1} s e r a + ε$