Table 2. Extracted data items.
| First author, year, country | Tonometer | Sample type | Mean IOP during follow-up (P/S) | HR | 95%CI | P | Adjustment risk factors |
| Ishida K, 1998, Japan | GAT | NTG | 14.4 mm Hg | 1.22 | 1.01-1.4 | 0.033 | Mean IOP, age, sex, HP, DM, VA, MD, CPSD, DH, BP, IOP parameter, recovery rate, pulse rate, follow-up, optic disc,ametropia, treatment |
| Asrani S, 2000, USA | home tonometry | OAG | 16.4 mm Hg | 2.89 | 1.2-6.97 | <0.025 | Age, office IOP, gender, race, baseline VF damage |
| Bengtsson B, 2005, Sweden | GAT | OHT | 22.7 mm Hg | 1.13 | 0.8-1.6 | 0.49 | Mean IOP |
| Badal F, 2005, USA | GAT | OAG | 15.4/14.5 mm Hg | 1.1 | NA | 0.023 | Age, sex, intervention sequence, number of intervention, baseline MD |
| Nakagami T, 2006, Japan | NA | NTG | 13.2 mm Hg | 0.724 | 0.59-0.888 | 0.002 | Age, refraction, mean IOP, DH, baseline VF damage |
| Bengtsson B, 2007, Sweden | GAT | POAG.NTG.XFG | 19.5/16.5 mm Hg | 1 | 0.81-1.24 | 0.999 | Mean IOP, age, baseline MD (≤-4)/iop (>21), both eyes eligible, exfoliation |
| Lee PP, 2007-1, USA | NA | POAG.NTG.OHT.GS | 16.5 mm Hg | 4.2 | 1.3-12.9 | 0.01 | Mean IOP, range of IOP, treatment, sex, age, baseline stage, VF stage |
| Lee PP, 2007-1, USA | NA | POAG.NTG.OHT.GS | 16.4 mm Hg | 5.5 | 3.4-9.1 | <0.001 | Mean IOP, range of IOP, treatment, sex, age, baseline stage, VF stage |
| Medeiros FA, 2008, USA | GAT | OHT | 25.4 mm Hg | 1.08 | 0.79-1.48 | 0.62 | Mean IOP, age, CCT, vertical C/D ratio and PSD |
| Sung KR, 2009, Korea | GAT | NTG | 13.5/13.6 mm Hg | 0.672 | 0.331-1.362 | 0.2702 | Univariate COX analysis |
| Teng CC, 2010, USA | Applanation tonometer | POAG.NTG.XFG.other | 15.5/16.2 mm Hg | 1.17 | 1.02-1.34 | 0.02 | Mean IOP, baseline IOP/MD, CCT, ametropia, Rim area, PPA, PPA area, PPA/disc ratio |
| Hoffmann EM, 2014, Germany | NA | NTG | NA | 2.03 | 1.1-3.74 | 0.02 | NA |
| Lee J, 2014-A, Korea | GAT | NTG | 11.8 mm Hg | 2.286 | 0.952-5.492 | 0.065 | Mean IOP, age, sex, ametropia, DM, baseline MD, SBP, DOPP, DH, CCT |
| Lee J, 2014-B, Korea | GAT | NTG | 14.5 mm Hg | 0.809 | 0.198-3.307 | 0.768 | Mean IOP, age, sex, ametropia, DM, DOPP, baseline MD, SBP, DH, CCT |
| Lee J, 2015, Korea | GAT | NTG | NA | 0.87 | 0.683-1.109 | 0.26 | Age, SE, BMI, baseline MD/PSD, SD of MAP, mean daytime OPP |
| Kim SH, 2016, Korea | GAT | NTG | 14.7 mm Hg | 0.311 | 0.056-1.717 | 0.18 | Mean IOP, age, sex, baseline IOP, CCT, baseline VFI, DH, adjusted SD of IOP |
IOP: Intraocular pressure; P/S: Mean IOP of progression/stable group during follow-up; NA: Not available; OHT: Ocular hypertension; NTG: Normal-tension glaucoma; POAG: Primary open angle glaucoma; XFG: Exfoliation glaucoma; GS: Glaucoma suspect; MD: Mean defect; VF: Visual field; CCT: Central corneal thickness; PSD: Pattern standard deviation; VFI: Visual field index; DH: Disc hemorrhage; SE: Spherical equivalent; PPA: Parapapillary atrophy; VA: Visual acuity; GAT: Goldmann applanation tonometer; DM: Diabetes mellitus; HP: Hypertension; MAP: Mean arterial pressure; OPP: Ocular perfusion pressure; BP: Blood pressure; BMI: Body mass index.