en Orthopedic Surgery Orthopedic Surgery Original Research Original Research <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span style="font-family:&quot;Times New Roman&quot;,serif"><span style="font-style:italic"><b><span style="font-size:9.0pt"><span style="font-style:normal">Background: </span></span></b><span style="font-size:9.0pt"><span style="font-style:normal">Individual variability in the length and thickness of hamstring tendon autografts is a serious drawback in using these tendons for anterior cruciate ligament reconstruction (ACLR). In this study, we aimed to determine the correlation between the anthropometric parameters and the size of hamstring tendon autografts.</span></span></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span style="font-family:&quot;Times New Roman&quot;,serif"><span style="font-style:italic"><span style="font-size:9.0pt"><span style="font-style:normal">&nbsp;&nbsp; <b>Methods:</b> In a cross-sectional study, 52 male ACLR candidates were included. The length of semitendinosus and gracilis tendons and the diameter of single, doubled, and quadrupled tendons were measured. A graft sizing block device with an incremental size change of 0.5 mm (range 4.5-12) was used to measure the tendon graft diameter. The evaluated anthropometric parameters included age, gender, height, weight, BMI, thigh length and diameter, calf length, thigh-to-calf ratio, wrist diameter, and ankle diameter. A Pearson&#39;s or Spearman&#39;s correlation coefficient test was used for evaluating the correlation of anthropometric factors with graft characteristics. </span></span></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span style="font-family:&quot;Times New Roman&quot;,serif"><span style="font-style:italic"><span style="font-size:9.0pt"><span style="font-style:normal">&nbsp;&nbsp; <b>Results:</b> The mean age of the patients was 27.1 &plusmn; 6.4 years. The semitendinosus length was significantly correlated with the patient&#39;s height (r = 0.373, </span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> = 0.007), thigh length (r = 0.364, </span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> = 0.009), and calf length (r = 0.340, </span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> = 0.015). The gracilis length was significantly correlated with thigh length (r = 0.278, </span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> = 0.049). The mean quadruple diameter was 8.56 &plusmn; 1.15 mm (range 6.5-11). The quadruple diameter was </span></span><span lang="AR-SA" style="font-size:9.0pt">&lrm;</span><span style="font-size:9.0pt"><span style="font-style:normal">significantly correlated with the thigh length (r = 0.283, </span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> = 0.044). No other significant correlation </span></span><span lang="AR-SA" style="font-size:9.0pt">&lrm;</span><span style="font-size:9.0pt"><span style="font-style:normal">was found between the tendons&rsquo; size and evaluated anthropometric parameters.</span></span></span></span></span></span></span></span><br> <span style="font-size:9.0pt"><span style="font-family:&quot;Times New Roman&quot;,serif">&nbsp;&nbsp; <b>Conclusion:</b> Thigh length was correlated with the semitendinosus length, gracilis length, and quadruple diameter. Therefore, it could be regarded as the most consistent and promising anthropometric factor in the prediction of hamstring autograft size.</span></span> Hamstring Autograft, Semitendinosus, Gracilis, Anthropometric Parameters 460 464 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-4132-2&slc_lang=en&sid=1 Abolfazl Bagherifard bagherifd@gmail.com 200319475328460077558 200319475328460077558 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Mahmoud Jabalameli jabalamelimd@yahoo.com 200319475328460077559 200319475328460077559 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Mehdi Mohammadpour mehdi.668491@gmail.com 200319475328460077560 200319475328460077560 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Milad Bahari miladbahari@ymail.com 200319475328460077561 200319475328460077561 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Amirali Karimi Dr_alikarimi@yahoo.com 200319475328460077562 200319475328460077562 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Nima Naderi Naderi.nima.md@gmail.com 200319475328460077563 200319475328460077563 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Mohamad Javad Taqian taqianmd@gmail.com 200319475328460077564 200319475328460077564 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Rahmatollah Jokar dr.r.jokar2@gmail.com 200319475328460077565 200319475328460077565 Yes Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran