| Author | Year | Number | Follow-up (years) | Evaluation | Results |
| Nathaniel F.R. Huang [24] | 2012 | 111 | 2 - 5 | IKS score, SF-12 | Coronal alignment within 3˚ of neutral has superior International Knee Society and SF-12 scores |
| Longstaff [4] | 2009 | 159 | 1 | Radiograph/KSS | Better outcome with good coronal femoral alignment |
| Lotke [25] | 1977 | 70 | 1 - 3 | Radiograph/Insall score | Good alignment had a significantly better outcome |
| Blakeney [8] | 2014 | 107 | 3.8 | Radiograph/KSS SF-12 | Significant correlation with radiographic sore and IKS and SF-12 |
| Jeffery [19] | 1991 | 115 | Soon after surgery - 12 | Radiograph/BASK score | Accurate alignment prevents component loosening |
| Choong [26] | 2009 | 115 | 6 weeks - 12 months | Radiograph/IKS/SF-12 score | Better IKS and SF-12 scores when correlated with mechanical within 3 degree of neutral |