Table 3. Studies and annual registries reporting two to three year UKA survivorship.

Author/Country	Year Published	Start Cohort	End Cohort	UKA (n)	Survivorship at two to three year follow-up
Cohort Studies
Eickmann et al. [46]	2006	1984	1998	411	96.0 %
Hamilton et al. [47]	2014	2001	2004	517	97.0 %
Liebs et al. [48]	2013	2002	2009	401	94.7 %
Lim et al. [49]	2012	2001	2011	400	97.4 %
Pandit et al. [18]	2011	1998	2009	1000	98.0 %
Vorlat et al. [50]	2006	1988	1996	149	97.8 %
Yoshida et al. [17]	2013	2002	2011	1279	98.3 %
Annual Registries
Australia [11]*	2014	1999	2013	41250	95.1 %
New Zealand [12]*	2013	2000	2012	7388	96.1 %
Sweden [13]*	2013	1999	2012		95.3 %
United Kingdom [51]	2013	2003	2010	30795	95.6 %
Cohort Studies					97.0 %
Annual Registries					95.5 %

UKA indicates unicompartmental knee arthroplasty.

^*These registries reported combined medial and lateral UKA survivorship with predominantly medial UKA