## 3 Results
### Potential Factors Associated with Overuse Injuries  
None of the factors tested on association with overuse injuries was significant (Table 4). Statistical trends were found for maturity group, puberty status, and height percentile group, \(p<0.10\), where a non-significantly higher injury risk was found for athletes being early maturing, post-pubertal, and larger.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Variable** & \begin{tabular}{c} **\% Observations** \\ **with Injuries** \\ \end{tabular} & \begin{tabular}{c} **N Observations** \\ **with Injuries** \\ \end{tabular} & \begin{tabular}{c} **N Observations** \\ **\end{tabular} & \begin{tabular}{c} **\(p\)** \\ **OR 1** \\ \end{tabular} & \
\begin{tabular}{c} **95\%CI Ib 2** \\ \end{tabular} &
\begin{tabular}{c} **95\%CI ub 3** \\ \end{tabular} \\ \hline Sex & & & & & & & \\ Female & 7.3\% & 14 & 191 & 0.952 & 0.97 & 0.42 & 2.28 \\ Male & 7.6\% & 22 & 291 & & 1 (ref) & & \\ Relative age quarter & & & & & & \\
1 st & 7.2\% & 11 & 153 & 0.875 & 0.91 & 0.30 & 2.82 \\
2 nd & 7.4\% & 11 & 149 & 0.956 & 0.97 & 0.28 & 3.30 \\
3 rd & 7.7\% & 8 & 104 & 0.998 & 1.00 & 0.30 & 3.27 \\
4 th & 7.9\% & 6 & 76 & & 1 (ref) & & \\ Age & & & & & & \\ [years] & & & & & & & \\
10 & 8.8\% & 5 & 57 & 0.600 & 1.50 & 0.33 & 6.82 \\
11 & 3.7\% & 4 & 109 & 0.391 & 0.55 & 0.14 & 2.14 \\
12 & 5.4\% & 7 & 130 & 0.865 & 0.88 & 0.20 & 3.79 \\
13 & 12.6\% & 17 & 135 & 0.199 & 2.12 & 0.67 & 6.66 \\
14 & 5.9\% & 3 & 51 & & 1 (ref) & & \\ Maturity & & & & & & & \\ group 4 & & & & & & & \\ Early & 15.8\% & 12 & 76 & 0.091 & 2.61 & 0.86 & 7.93 \\ Average & 5.8\% & 19 & 330 & 0.757 & 0.84 & 0.28 & 2.55 \\ Late & 6.6\% & 5 & 76 & & 1 (ref) & & \\ Puberty & & & & & & & \\ status 5 & & & & & & & \\ Pre-pubertal & 4.5\% & 8 & 179 & 0.069 & 0.37 & 0.12 & 1.08 \\ Pubertal & 8.6\% & 19 & 222 & 0.449 & 0.71 & 0.29 & 1.72 \\ Post-pubertal & 11.1\% & 9 & 81 & 1 (ref) & & \\ \multicolumn{5}{c}{Core flexion to extension strength ratio group 6} \\ Ratio 1 & & & & & & & \\ and below & & & & & & & \\ Ratio \textgreater{} 1 & 7.1\% & 15 & 210 & & 1 (ref) & & \\ \hline \hline \end{tabular}
\end{table}
Table 4: Potential factors associated with overuse injuries according to the simple general estimating equation analysis (n = 482 observations).  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Variable** & \begin{tabular}{c} **\% Observations with Injuries** \\ \end{tabular} & \begin{tabular}{c} **\(p\)** \\ **OR 1** \\ \end{tabular} & \
\begin{tabular}{c} **95\%CI Ib 2** \\ \end{tabular} &
\begin{tabular}{c} **95\%CI ub 3** \\ \end{tabular} \\ \hline Age [years] & & & & & \\
10 & 28.1\% & **0.018** & **3.72** & 1.26 & 11.04 \\
11 & 17.4\% & 0.148 & 2.15 & 0.76 & 6.03 \\
12 & 20.0\% & 0.066 & 2.55 & 0.94 & 6.93 \\
13 & 15.6\% & 0.220 & 1.86 & 0.69 & 5.02 \\
14 & 9.8\% & & 1 (ref) & & \\ Weight percentile group & & & & & \\
25 and below & 11.0\% & **0.027** & **0.37** & 0.15 & 0.89 \\ \textgreater{}25 to \textless{}75 & 18.9\% & 0.375 & 0.71 & 0.33 & 1.52 \\
75 and above & 25.7\% & & 1 (ref) & & \\ \hline \hline \end{tabular}  
* OR: odds ratio, 2 95%CI lb: 95% confidence interval lower bound, 3 95%CI ub: 95% confidence interval upper bound, bold values indicate statistically significant values.  
\end{table}
Table 3: Results of the multiple general estimating equation analysis of factors associated with traumatic injuries based on \(n=474\) observations.