Table 5 Comparison of trabecular meshwork heights categorised by age group.

Analysis of covariance
Variable	≤40	41–50	51–60	61–70	71–80	81≤	overall p-value
Estimated Mean TM height (SE)	843.412 (17.579)	796.363	790.791	780.968	731.582	725.347	<0.0001
Post-hoc analysis
Post-hoc p-value - Least significant difference
≤40	ref
41–50	0.0307	ref
51–60	0.0091	0.7036	ref
61–70	0.0015	0.3197	0.4512	ref
71–80	<0.0001	<0.0001	<0.0001	<0.0001	ref
81≤	<0.0001	<0.0001	<0.0001	0.0001	0.6652	ref
Post-hoc p-value - Bonferroni correction
≤40	ref
41–50	0.4602	ref
51–60	0.1363	>0.9999	ref
61–70	0.0225	>0.9999	>0.9999	ref
71–80	<0.0001	0.0005	0.0001	0.0006	ref
81≤	<0.0001	0.0008	0.0004	0.0021	>0.9999	ref

Analysis of Covariance was used to compare the estimated mean trabecular meshwork heights of the different age groups after adjusting for sex, CCT, IOP, and AXL.
Post-hoc analysis was carried out with least significant difference (non-calibrated value) and multiple Bonferroni correction (calibrated value).
IOP: Intraocular pressure; CCT: Central corneal thickness; AXL: axial length; SE: standard error.

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