Table 4.

Linear regression estimated coefficients of IOP at 1-year follow-up

	Estimate	Standard error	t-statistic	p-value
TE
(Intercept)	1.8446	1.3878	1.3291	0.18648
Preoperative BCVA	−0.5656	1.2505	−0.45229	0.65193
Preoperative IOP	0.069944	0.037012	1.8898	0.061347
Preoperative MD	−0.060344	0.038653	−1.5612	0.12128
Postoperative BCVA at 3 months	3.4264	2.4723	1.3859	0.1685
Postoperative IOP at 3 months	0.044491	0.086579	0.51388	0.60834
Postoperative BCVA at 6 months	−4.7577	2.271	−2.095	0.038409
Postoperative IOP at 6 months	0.7561	0.074223	10.187	0.109917
Postoperative BCVA at 1 year	0.82468	1.4068	0.5862	0.55891
PTE
(Intercept)	5.8161	2.387	2.4366	0.016817
Preoperative BCVA	0.91688	1.2924	0.70944	0.47991
Preoperative IOP	0.021982	0.047813	0.45974	0.64682
Preoperative MD	−0.031443	0.057459	−0.54723	0.58559
Postoperative BCVA at 3 months	−2.8912	3.2134	−0.89971	0.3707
Postoperative IOP at 3 months	−0.03079	0.11449	−0.26894	0.7886
Postoperative BCVA at 6 months	6.2465	3.2539	1.9197	0.058099
Postoperative IOP at 6 months	0.60766	0.12121	5.0132	0.705306
Postoperative BCVA at 1 year	−4.5083	2.0104	−2.2425	0.027414
VC
(Intercept)	11.692	2.5272	4.6263	1.5011e–05
Preoperative BCVA	3.4322	1.4771	2.3235	0.022825
Preoperative IOP	0.10263	0.06919	1.4833	0.14212
Preoperative MD	0.019055	0.051755	0.36818	0.71377
Postoperative BCVA at 3 months	−2.3511	3.7806	−0.62188	0.53588
Postoperative IOP at 3 months	0.11755	0.12244	0.96007	0.34006
Postoperative BCVA at 6 months	1.1678	1.8681	0.6251	0.53377
Postoperative IOP at 6 months	−0.13546	0.098369	−1.3771	0.17254
Postoperative BCVA at 1 year	−1.6639	2.2009	−0.75601	0.45198

Note: Number of observations: 104, error degrees of freedom: 76, root mean squared error: 3.54, R²: 0.261, adjusted R²: 0.14, F-statistic vs constant model: 2.24, p-value =0.0177.

Abbreviations: IOP, intraocular pressure; TE, trabeculectomy; BCVA, best-corrected visual acuity; MD, mean deviation; PTE, phacotrabeculectomy; VC, viscocanalostomy.