TKA	total knee arthroplasty
QoL	Quality of life
WOMAC	Western Ontario McMaster Universities Osteoarthritis Index
SF-12 questionnaire	Short Form 12 questionnaire
Euro-Qol-5D L-VAS	The EQ-5D-5L questionnaire essentially consists of two pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS).
ANCOVA	analysis of covariance
PSM	propensity score matching
Cr-Co	chromium–cobalt
BMI	body mass index
PS	TKA posterior stabilized
PHQ-15 questionnaires	Patient Health Questionnaire Spanish version.
MPPF	María del Pilar Peña Fernández, author
KSS	Knee Society Clinical Rating System questionnaire