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Estimated Trans-Lamina Cribrosa Pressure Differences in Low-Teen and High-Teen Intraocular Pressure Normal Tension Glaucoma: The Korean National Health and Nutrition Examination Survey

 Si Hyung Lee  ;  Seung Woo Kwak  ;  Eun Min Kang  ;  Gyu Ah Kim  ;  Sang Yeop Lee  ;  Hyoung Won Bae  ;  Gong Je Seong  ;  Chan Yun Kim 
 PLoS One, Vol.11(2) : e0148412, 2016 
Journal Title
 PLoS One 
Issue Date
Adult ; Aged ; Blood Pressure* ; Female ; Glaucoma/epidemiology ; Glaucoma/physiopathology* ; Humans ; Hypertension/epidemiology ; Hypertension/physiopathology* ; Intraocular Pressure* ; Male ; Middle Aged ; Prevalence ; Republic of Korea/epidemiology
BACKGROUND: To investigate the association between estimated trans-lamina cribrosa pressure difference (TLCPD) and prevalence of normal tension glaucoma (NTG) with low-teen and high-teen intraocular pressure (IOP) using a population-based study design. METHODS: A total of 12,743 adults (≥ 40 years of age) who participated in the Korean National Health and Nutrition Examination Survey (KNHANES) from 2009 to 2012 were included. Using a previously developed formula, cerebrospinal fluid pressure (CSFP) in mmHg was estimated as 0.55 × body mass index (kg/m2) + 0.16 × diastolic blood pressure (mmHg)-0.18 × age (years)-1.91. TLCPD was calculated as IOP-CSFP. The NTG subjects were divided into two groups according to IOP level: low-teen NTG (IOP ≤ 15 mmHg) and high-teen NTG (15 mmHg < IOP ≤ 21 mmHg) groups. The association between TLCPD and the prevalence of NTG was assessed in the low- and high-teen IOP groups. RESULTS: In the normal population (n = 12,069), the weighted mean estimated CSFP was 11.69 ± 0.04 mmHg and the weighted mean TLCPD 2.31 ± 0.06 mmHg. Significantly higher TLCPD (p < 0.001; 6.48 ± 0.27 mmHg) was found in the high-teen NTG compared with the normal group. On the other hand, there was no significant difference in TLCPD between normal and low-teen NTG subjects (p = 0.395; 2.31 ± 0.06 vs. 2.11 ± 0.24 mmHg). Multivariate logistic regression analysis revealed that TLCPD was significantly associated with the prevalence of NTG in the high-teen IOP group (p = 0.006; OR: 1.09; 95% CI: 1.02, 1.15), but not the low-teen IOP group (p = 0.636). Instead, the presence of hypertension was significantly associated with the prevalence of NTG in the low-teen IOP group (p < 0.001; OR: 1.65; 95% CI: 1.26, 2.16). CONCLUSIONS: TLCPD was significantly associated with the prevalence of NTG in high-teen IOP subjects, but not low-teen IOP subjects, in whom hypertension may be more closely associated. This study suggests that the underlying mechanisms may differ between low-teen and high-teen NTG patients.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Eun Min(강은민)
Kim, Gyuah(김규아)
Kim, Chan Yun(김찬윤) ORCID logo https://orcid.org/0000-0002-8373-9999
Bae, Hyoung Won(배형원) ORCID logo https://orcid.org/0000-0002-8421-5636
Seong, Gong Je(성공제) ORCID logo https://orcid.org/0000-0002-5456-4296
Lee, Sang Yeop(이상엽) ORCID logo https://orcid.org/0000-0002-3834-7953
Lee, Si Hyung(이시형)
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