. 2025 Sep 1;18(8):811–835. doi: 10.70252/WUPH8495

Supplementary Table 3.

Summary of Model Comparisons by Variable and Type

Variable	Model	Adj. R²	DF	F-Statistic	RSE	SSE	P-value	AIC
Body Fat Percentage (%)	Main Effects	0.42	298	109.271	6.558	12816.621	< 0.001	1991.369
Body Fat Percentage (%)	Interaction	0.42	297	73.250	6.557	12768.413	< 0.001	1992.234
Body Mass Index (BMI)	Main Effects	0.01	302	2.657	4.621	6448.601	< 0.001	1804.201
Body Mass Index (BMI)	Interaction	0.01	301	1.798	4.628	6446.534	< 0.001	1806.103
Fat Mass Index (kg·m⁻²)	Main Effects	0.22	298	43.363	2.938	2573.584	< 0.001	1508.130
Fat Mass Index (kg·m⁻²)	Interaction	0.22	297	29.520	2.935	2559.408	< 0.001	1508.468
Fat-Free Mass Index (kg·m⁻²)	Main Effects	0.41	298	248.314	2.045	1246.039	< 0.001	1289.806
Fat-Free Mass Index (kg·m⁻²)	Interaction	0.41	297	71.235	2.048	15840.908	< 0.001	1291.596
Functional Reach Test (cm)	Main Effects	0.01	302	3.299	5.828	10258.337	< 0.001	1945.790
Functional Reach Test (cm)	Interaction	0.01	301	2.211	5.837	10256.419	< 0.001	1947.733
Sit-and-Reach Test (cm)	Main Effects	0.12	302	22.693	9.406	26718.325	< 0.001	2237.754
Sit-and-Reach Test (cm)	Interaction	0.13	301	15.784	9.393	26556.045	< 0.001	2237.896
Cognitive Response Time (s)	Main Effects	0.08	302	13.717	2.389	1724.171	< 0.001	1401.870
Cognitive Response Time (s)	Interaction	0.10	301	11.902	2.363	1681.337	< 0.001	1396.198
Countermovement Jump (cm)	Main Effects	0.48	296	138.519	5.923	10383.630	< 0.001	1917.240
Countermovement Jump (cm)	Interaction	0.48	295	92.549	5.925	10355.625	< 0.001	1918.433
Grip Strength (kg)	Main Effects	0.55	302	188.368	15.471	72288.137	< 0.001	2541.324
Grip Strength (kg)	Interaction	0.55	301	125.481	15.486	72186.083	< 0.001	2542.893
Isometric Midthigh Pull (kg)	Main Effects	0.37	253	74.347	53.010	710954.926	< 0.001	2764.368
Isometric Midthigh Pull (kg)	Interaction	0.36	252	49.369	53.115	710953.844	< 0.001	2766.368
Plank (s)	Main Effects	0.05	296	9.455	60.265	1075030.021	< 0.001	3304.562
Plank (s)	Interaction	0.07	295	8.352	59.779	1054173.948	< 0.001	3300.705
Est. VO₂Max (ml·kg·⁻¹·min⁻¹)	Main Effects	0.20	302	39.929	4.410	5874.476	< 0.001	1775.761
Est. VO₂Max (ml·kg·⁻¹·min⁻¹)	Interaction	0.21	301	27.691	4.398	5821.260	< 0.001	1774.985

Notes: kg·m⁻² = kilograms per square meter; cm = centimeters; s = seconds; kg = kilograms; ml·kg⁻¹·min⁻¹ = milliliters per kilogram per minute; Adj. R² = Adjusted R²; DF = degrees of freedom; RSE = Residual Square Error; SSE = sum of squared errors; AIC = Akiake Information Criterion; Main Effects: Y = β₀ + β₁Sex + β₂Age_C + ε; Interaction: Y = β₀ + β₁Sex + β₂Age_C + β₃(Sex*Age_C) + ε.