Table 2. Pairwise Comparison of wideband absorbance Across Different Age Groups.

Age Group Comparison	Mean Difference	Standard Error	P	95% Confidence Interval Lower Bound	95% Confidence Interval Upper Bound
Note: Group 1 (0-3 months, n=44), Group 2 (3-6 months, n=60), Group 3 (6-12 months, n=102), Group 4 (1-3 years, n=223), and Group 5 (3-6 years, n=150). Pairwise comparisons were Bonferroni-adjusted for 10 multiple comparisons. A corrected significance threshold of p < 0.005 was applied. Asterisks (*) indicate statistically significant differences after correction.
1 vs 2	-0.046	0.014	0.009	-0.085	-0.007
1 vs 3	0.031	0.013	0.128	-0.067	0.004
1 vs 4	0.074	0.012	<0.001*	0.041	0.106
1 vs 5	-0.116	0.012	<0.001*	-0.149	-0.083
2 vs 3	0.046	0.014	0.009	0.007	0.085
2 vs 4	0.078	0.011	<0.001*	0.046	0.11
2 vs 5	0.120	0.010	<0.001*	0.091	0.149
3 vs 4	-0.07	0.010	0.01	-0.099	-0.04
3 vs 5	0.042	0.008	<0.001*	0.019	0.066
4 vs 5	0.147	0.009	<0.001*	0.123	0.172