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. 2015 Jul 17;29(10):1242–1250. doi: 10.1038/eye.2015.127

Table 1. Characteristics of the studies.

Authors Ren et al12 Ren et al15 Siaudvytyte et al24 Berdahl et al25 Berdahl et al26
Study type Observational, prospective Observational, prospective Observational, prospective Observational, retrospective Observational, retrospective
Included groups POAG (NTG+HTG), OH NTG, HTG, healthy NTG, HTG, healthy POAG and healthy POAG (NTG+HTG), NTG, OH, healthy
ICP measurement method Invasive Invasive Noninvasive Invasive Invasive
           
Other data
 Day of IOP and ICP measurements Same day Same day Same day Maximum IOP before lumbar puncture Maximum IOP before lumbar puncture
 Wash-out period 1 month for NTG, HTG – did not include 1 month for NTG, HTG – did not include Did not include Did not include Did not include
 Neurologist consultation + + — + +
 Approval of the Ethics Committee + + + + +

Abbreviations: HTG, high-tension glaucoma; ICP, intracranial pressure; IOP, intraocular pressure; NTG, normal tension glaucoma; OH, ocular hypertension; POAG, primary open-angle glaucoma.