Short-term reproducibility of intraocular pressure and ocular perfusion pressure measurements in Chinese volunteers and glaucoma patients

Table 4 Intraclass Correlation Coefficient Estimates for the Main Parameters in diurnal curves

Parameters		Control			NTG			POAG
Parameters	Day 1	Day 2	ICC^a	Day 1	Day 2	ICC^a	Day 1	Day 2	ICC^a
Mean IOP	14.3 ± 2.0	14.3 ± 2.0	0.921	14.0 ± 1.7	13.8 ± 1.7	0.862	28.5 ± 2.4	28.1 ± 2.0	0.857
Peak IOP	16.8 ± 2.2	16.4 ± 2.2	0.889	16.3 ± 1.9	16.0 ± 1.7	0.741	31.2 ± 2.4	31.1 ± 2.1	0.666
Trough IOP	12.0 ± 2.0	12.0 ± 2.0	0.888	11.8 ± 1.7	11.7 ± 2.1	0.798	25.8 ± 2.6	25.3 ± 2.3	0.808
IOP Fluctuation	4.8 ± 1.4	4.3 ± 1.4	0.661	4.5 ± 1.4	4.4 ± 1.5	0.290	5.4 ± 1.8	5.7 ± 2.0	0.546
Mean OPP	45.1 ± 5.3	44.4 ± 5.2	0.962	43.6 ± 5.5	43.4 ± 5.1	0.947	30.1 ± 4.7	29.2 ± 4.5	0.934
Peak OPP	49.8 ± 5.5	49.3 ± 5.7	0.918	48.7 ± 6.2	48.2 ± 5.4	0.828	34.8 ± 5.3	34.1 ± 4.6	0.842
Trough OPP	40.1 ± 5.9	39.3 ± 5.6	0.953	38.7 ± 5.5	38.5 ± 5.4	0.927	25.2 ± 4.8	24.7 ± 4.7	0.910
OPP Fluctuation	9.7 ± 3.4	10.0 ± 3.0	0.680	10.0 ± 4.4	9.7 ± 3.4	−0.008	9.7 ± 3.3	9.5 ± 2.8	0.093

Data are expressed as mean ± standard deviation
IOP intraocular pressure, OPP ocular perfusion pressure, ICC intraclass correlation coefficient
^aAll ICC measurements, P < 0.001

ISSN: 1471-2415