## 4 Discussion  
This prospective study demonstrated that the QT autograft has at least the same properties as the HT autograft in the early stages after ACL reconstruction in adolescent athletes. However, in some respects it seems superior to the HT autograft. At the very first assessment of operated knee laxity (side-to-side anterior tibial translation) 3 months after the ACLR, the QT autograft performed twice better than the HT autograft. The QT is the least studied and used autograft, with its use just expected to increase [18]. [PERSON] et al. [19] in their meta-analysis published in 2019, reported only five articles that compared the HT and QT autografts for ACLR. Moreover, in all those studies, the QT autograft was harvested with a patellar bone block. In general, only few \begin{table}
\begin{tabular}{c c c c c} \hline  & & **Males** & **Females** & \(p\)**Value** \\ \hline \multirow{8}{*}{HT} & GNRB1 134 N (3 months post-op) & \multirow{2}{*}{15} & \multirow{2}{*}{12} & \multirow{2}{*}{\(p\) = 0.003} \\  & Median (min-max; mean) & 2.4 (0.3–5.2; 2.333) & 0.45 (0.2–3.4; 0.942) & \\ \cline{2-5}  & GNRB1 134 N (6 months post-op) & \multirow{2}{*}{14} & \multirow{2}{*}{12} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 2.3 (0.2–5.3; 2.036) & 0.7 (0.3–2.3; 0.917) & \\ \cline{2-5}  & Curve slope 134 N (3 months post-op) & \multirow{2}{*}{15} & \multirow{2}{*}{12} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 6.5 (0.1–23; 7.227) & 2.9 (0–12.9; 4.408) & \\ \cline{2-5}  & Curve slope 134 N (6 months post-op) & \multirow{2}{*}{14} & \multirow{2}{*}{12} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 6.55 (1.7–26.1; 8.629) & 3.85 (0.1–7.6; 3.583) & \\ \hline \multirow{8}{*}{QT} & GNRB1 134 N (3 months post-op) & \multirow{2}{*}{13} & \multirow{2}{*}{8} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 0.7 (0.1–2; 0.962) & 0.35 (0.1–2.1; 0.812) & \\ \cline{2-5}  & GNRB1 134 N (6 months post-op) & \multirow{2}{*}{11} & \multirow{2}{*}{8} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 0.8 (0.3–3.4; 1.473) & 1.15 (0.3–1.7; 1.013) & \\ \cline{2-5}  & Curve slope (3 months post-op) & \multirow{2}{*}{13} & \multirow{2}{*}{8} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 3.6 (1.8–7.6; 3.862) & 4.15 (3–9.4; 4.988) & \\ \cline{2-5}  & Curve slope (6 months post-op) & \multirow{2}{*}{11} & \multirow{2}{*}{8} & \multirow{2}{*}{n.s.} \\  & Median (min-max; mean) & 5.3 (0–18.3; 6.855) & 0.9 (0–13.1; 2.963) & \\ \hline \end{tabular}
\end{table} 
Table 4: Performance of the different autografts in males and females. studies have analyzed QT autografts with a patellar bone block [13; 20; 21; 22]. [PERSON] et al. [23], in their systematic review, compared only 181 all-soft-tissue QT patients (5 studies) with 1534 patellar bone QT patients (20 studies). There is limited information on the all-soft-tissue QT autograft for ACLR, and comparative studies are lacking, but the results are promising, as researchers reported no difference in graft rupture between all-soft-tissue QT and patellar-bone-block QT autografts [23], great functional outcomes at short and intermediate follow-up [24] and decreased donor site morbidity [25]. Our study mainly concentrated on two poorly studied fields: the all-soft-tissue QT autograft and its use in young and active patients [11; 18]. That makes this study interesting and of current relevance for today's orthopedics. Our results regarding the stability of the knee are quite interesting. Comparing the HT and QT autograft performances during Genourob testing regardless of the sex, we found that the QT results were statistically significantly better at the 3-month follow-up. In contrast, at the 6-month follow-up, each autograft option appeared to perform statistically equally. There are no studies comparing such early knee laxity follow-up results in adolescents. However, some studies reported similar results. For example, [PERSON] et al. [13] reported a significant variation in side-to-side laxity in patients after ACLR with an HT autograft after 3 years from surgery.