Table 2.

Pairwise comparative analyses between each NCT and GAT in subgroups divided by G-IOP

Subgroupsa	n	C-IOP – G-IOP	N-IOP – G-IOP	T-IOP – G-IOP
Low-teen	14	1.71 ± 2.23 ( p = 0.013)	−1.14 ± 2.57 (p = 0.120)	1.14 ± 1.96 (p = 0.048)
Mid-teen	22	1.77 ± 1.34 ( p < 0.001)	−0.32 ± 1.67 (p = 0.382)	1.00 ± 2.07 (p = 0.034)
High-teen	16	0.56 ± 1.59 (p = 0.178)	−1.75 ± 1.65 ( p = 0.001)	−0.81 ± 1.83 (p = 0.097)

C-IOP IOP value measured by Canon NCT, N-IOP Nidek NCT, T-IOP Topcon NCT, G-IOP GAT

Values are presented as the mean ± standard deviation. P value by paired t-test

^aCategorized into low-teen (<14 mmHg), mid-teen (≥14 and ≤17 mmHg) and high-teen (>17 mmHg) groups