TABLE III.

Log-Linear OLS Regression Estimates and Growth Rates

Procedure Type ($y)$	Intercept ($\widehat{{\beta }_0}$)	Trend Estimate ($\widehat{{\beta }_1}$)	Standard Error ($\widehat{SE})$ of $\widehat{{\beta }_1}$	Projected Annual Growth*
				Average†	95% CI, Lower‡	95% CI, Upper§
Primary THA	11.4084	0.0507	0.0017	5.20%	4.86%	5.54%
Primary TKA	12.2342	0.0435	0.0025	4.44%	3.93%	4.96%

^* $\mathrm{C}\mathrm{a}\mathrm{l}\mathrm{c}\mathrm{u}\mathrm{l}\mathrm{a}\mathrm{t}\mathrm{e}\mathrm{d}\hspace{0.17em}\mathrm{u}\mathrm{s}\mathrm{i}\mathrm{n}\mathrm{g}\hspace{0.17em}\mathrm{n}\mathrm{o}\mathrm{r}\mathrm{m}\mathrm{a}\mathrm{l}\hspace{0.17em}\mathrm{a}\mathrm{p}\mathrm{p}\mathrm{r}\mathrm{o}\mathrm{x}\mathrm{i}\mathrm{m}\mathrm{a}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}.\hspace{0.17em}\mathrm{C}\mathrm{I}=\mathrm{c}\mathrm{o}\mathrm{n}\mathrm{f}\mathrm{i}\mathrm{d}\mathrm{e}\mathrm{n}\mathrm{c}\mathrm{e}\hspace{0.17em}\mathrm{i}\mathrm{n}\mathrm{t}\mathrm{e}\mathrm{r}\mathrm{v}\mathrm{a}\mathrm{l}.$

^†$\left(\exp \left[\widehat{{\beta }_1}\right]-1\right)\times 100$.

^‡$\left(\exp [\widehat{{\beta }_1}-(1.96\times \widehat{SE})]-1\right)\times 100$.

^§$\left(\exp [\widehat{{\beta }_1}+(1.96\times \widehat{SE})]-1\right)\times 100$.