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Table 4 Ratios of related parameters of the osteotomy surface

From: Study on the morphological characteristics and rotational alignment axis of placement plane of the tibial component in total knee arthroplasty for hemophilia-related knee arthritis

Proportions HA group (n = 40) Mean ± SD (range) OA group (n = 42) Mean ± SD (range) t P
APL/GTL 0.6265 ± 0.0497 (0.5019, 0.7105) 0.6677 ± 0.0695 (0.5574, 0.8972) − 3.072 0.003
M1/PTL 0.146 ± 0.1607 (− 0.1061c, 0.7743) 0.2686 ± 0.1479 (− 0.1288c, 0.5106) − 3.586 0.001
M2/TTL 0.1223 ± 0.1612 (− 0.2037c, 0.5815) 0.2082 ± 0.1574 (− 0.0373c, 0.6812) − 2.441 0.017
  1. HA: Hemophiliac Arthritis, OA: Osteoarthritis, SD: Standard Deviation, APL/GTL: the ratio of the anteroposterior length to the geometric transverse length of the osteotomy surface, M1/PTL: the medial patellar tendon width percentage, M2: width of the tibial tubercle on the medial side of 0°AP axis, M2/TTL: the medial tibial tubercle width percentage
  2. cThe value is assigned as the 0°AP axis on the internal of the medial edge of the patellar tendon or tibial tubercle