Table 2

Five-year changes of AS-OCT parameters in dark and light-to-dark during the follow-up

Parameter	Baseline measurement	Follow-up measurement	Mean difference (95% CI)*	P value
In dark condition
TISA500, mm²	0.077±0.05	0.082±0.05	−0.005 (-0.015 to 0.004)	0.287
ARA750, mm²	0.158±0.101	0.164±0.091	−0.006 (−0.026 to −0.013)	0.548
IT750, mm	0.450±0.176	0.473±0.897	−0.023 (−0.05 to −0.006)	0.119
Iarea, mm²	1.569±0.484	1.537±0.226	0.031 (−0.046 to −0.108)	0.431
ACW, mm	11.74±0.44	11.60±0.37	0.141 (0.058 to 0.224)	0.001
ACA, mm²	18.94±2.89	18.51±2.94	0.426 (−0.168 to 1.020)	0.160
LV,μm	573.5±246.2	551.7±266.7	21.772 (−30.56 to 74.11)	0.414
PD, mm	4.32±1.14	4.44±0.69	−0.124 (−0.315 to 0.068)	0.205
Light-to-dark changes
ΔTISA500, mm²	0.022±0.032	0.023±0.031	−0.001 (−0.007 to 0.006)	0.822
ΔARA, mm²	−0.045±0.065	−0.049±0.067	−0.004 (−0.017 to 0.009)	0.521
ΔIT750, mm	−0.075±0.166	−0.032±0.081	−0.044 (−0.070 to −0.167)	0.001
ΔIarea, mm²	0.270±0.414	0.262±0.183	0.009 (−0.056 to 0.075)	0.784
ΔACW, mm	0.052±0.197	−0.006±0.166	0.057 (0.020 to 0.094)	0.003
ΔACA, mm²	−0.709±0.271	−0.589±0.273	−0.118 (−0.174 to -0.062)	<0.001
ΔLV, μm	20.4±70.9	15.996±75.96	4.4 (−10.5 to 19.3)	0.564
ΔPD, mm	−1.7±1.1	−1.3±0.9	−0.42 (−0.63 to -0.22)	<0.001

Bold indicates statistical significance.
*Parameters in 2008 minus those in 2013.
ACA, anterior chamber area; ACW, anterior chamber width; ARA, angle recess area;AS-OCT, anterior segment optical coherence tomography; IT750, iris thickness at 750 µm; Iarea, iris area; LV, lens vault; PD, pupil diameter; TISA500, trabecular iris space area at 500 µm.