Table 1.

Demographic data

	Total	With RLL	Without RLL	p -value
No. of TKAs	135	65	70	NA
No. of patients	131	62	69	NA
Mean age (years)	68.2 ± 7.5	68.3 ± 7.9	68.2 ± 7.2	0.92
BMI (kg/m2)	28.5 ± 6.7	27.5 ± 4.2	27.7 ± 4.3	0.78
Males (%)	43 (32.6)	26 (41.2)	18 (26.1)	0.06
Laterality (left : right)	61 : 74	29: 36	32: 38	0.90
Follow-up period (months)	15.9 ± 5.3	16.4 ± 4.9	16.2 ± 5.1	0.82
Pre-operative anatomical knee alignment ($°$) [varus (-), valgus (+)]	-3.7 ± 9.5	-5.1 ± 6.4	-2.4 ± 11.5	0.15
3-month anatomical knee alignment ($°$) [varus (-), valgus (+)]	5.6 ± 2.7	5.9 ± 2.6	5.4 ± 2.8	0.31
1-year anatomical knee alignment ($°$) [varus (-), valgus (+)]	5.1 ± 3.5	5.2 ± 3.2	5.1 ± 3.7	0.89
1-year Hip-Knee-Ankle angle ($°$) [varus (-), valgus (+)]	0.02 ± 3.8	0.18 ± 3.1 (range -13.6 – 11.9)	-0.12 ± 4.3 (range -7.2 – 7.6)	0.68
1-year tibial keel alignment ($°$) [varus (-), valgus (+)]	0.72 ± 2.1	0.93 ± 2.3 (range -6 – 8.3)	0.53 ± 1.8 (range -3 – 5.8)	0.31

Legend: TKA (Total Knee Arthroplasty); RLL (Radiolucent Line); BMI (Body Mass Index)