FIGURE 4.
Regression analysis for the availability of linoleic acid (LA) between 1909 and 1999. The linear relation [LA percentage of energy (en%) = −115.4221 + 0.0617 × x] was significant at P < 0.000001 with a coefficient of determination of r2 = 0.95 (STATISTICA for Windows version 8.0; StatSoft, Tulsa, OK).