Table 4.

Intra-observer and inter-observer correlation for primary variables measured

Primary Variable Measured	Intra-observer Correlation$ (r)	Inter-observer Correlation# (r)
Pre-operative HKA axis	0.99	1.00
Post-operative HKA axis	0.99	0.98
Pre-operative mLDFA	0.98	0.98
Post-operative mLDFA	0.97	0.97
Pre-operative MPTA	0.99	0.99
Post-operative MPTA	0.96	0.95

^$ and ^#: p value < 0.0001 for all the variables measured