Thinning of maximum ciliary body thickness: a potential early indicator for pseudophakic malignant glaucoma in primary angle closure glaucoma

Table 2 Quantitative measurements by ultrasound biomicroscopy (UBM) in recruited eyes before and at the onset of malignant glaucoma

Parameters	Before cataract surgery (means from 4 quadrants in UBM)			After cataract surgery (means from 4 quadrants in UBM)
	Pre-onset of malignant glaucoma	Matched eyes	P value	Onset of malignant glaucoma	Matched eyes	P value
	(n = 30)	(n = 30)	P value	(n = 30)	(n = 30)	P value
ACD	1.97 ± 0.12	1.99 ± 0.27	0.638	2.41 (2.25, 2.53)	3.54 (3.39, 3.75)	< 0.001*
ACW	10.34 ± 0.43	10.14 ± 0.35	0.058	10.17 ± 0.36	10.26 ± 0.40	0.389
LV	0.65 ± 0.19	0.71 ± 0.09	0.101	0.46 (0.32, 0.58)	-0.60 (-0.75, -0.52)	< 0.001*
STS	9.88 (9.75, 10.08)	9.75 (9.45 10.08)	0.133	9.90 ± 0.35	9.72 ± 0.39	0.069
AVD	1.02 ± 0.09	1.04 ± 0.16	0.531	0.69 (0.54, 0.74)	-0.35 (-0.48, -0.21)	< 0.001*
CBTmax	0.87 ± 0.09	0.95 ± 0.09	0.001*	0.87 ± 0.11	1.05 ± 0.11	< 0.001*
CBT0	0.82 ± 0.09	0.85 ± 0.11	0.347	0.81 ± 0.10	0.92 ± 0.13	< 0.001*
CBT1000	0.57 ± 0.06	0.61 ± 0.08	0.069	0.56 ± 0.07	0.63 ± 0.08	0.001*
APCB	0.45 ± 0.19	0.48 ± 0.19	0.595	0.44 ± 0.14	0.44 ± 0.20	0.923
TCA	57.59 ± 17.81	62.61 ± 13.17	0.220	53.92 ± 13.41	70.92 ± 10.65	< 0.001*

ACD, central anterior chamber depth; ACW, anterior chamber width; LV, lens vault; STS, sulcus to sulcus; AVD = anterior vault distance; CBTmax, maximum ciliary body thickness; CBT0, ciliary body thickness at point of the scleral spur; CBT1000, ciliary body thickness at 1000 mm from the scleral spur; APCB, anterior placement of ciliary body; TCA, trabecular ciliary process angle. Data are expressed as means ± SD for normal continuous variables and median (Q1, Q3) for non-normal variables. The mean in each parameter is the average of superior, nasal, inferior, and temporal quadrant of the eyeball in UBM. P value was calculated by independent samples t-test or Mann-Whitney U test. * indicates P value less than 0.05

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