Table 2

Univariable logistic regression of previously diagnosed versus previously undiagnosed primary open angle glaucoma (0=diagnosed 1=undiagnosed)

Characteristics		OR (95% CI)	P value
Age, years		0.96 (0.93 to 0.99)	0.008
Sex	Male	1.00
	Female	0.68 (0.42 to 1.09)	0.15
Social class	Professional/managerial	1.00
	Skilled (manual/non-manual)	0.57 (0.33 to 0.98)	0.04
	Semi-skilled/unskilled	1.84 (0.93 to 3.63)	0.08
Education	No qualifications	1.00
	O levels	1.44 (0.59 to 3.50)	0.42
	A levels	1.01 (0.59 to 1.74)	0.96
	Degree	0.84 (0.38 to 1.88)	0.68
Currently employed?	No	1.00
	Yes	2.12 (1.10 to 4.06)	0.02
How often do you not have enough money for basics?	Never	1.00
How often do you not have enough money for basics?	Seldom/sometimes	0.93 (0.56 to 1.54)	0.77
POAG type	HTG	1.00
	NTG	11.8 (6.52 to 21.5)	<0.0001
IOPg (mm Hg)		1.04 (0.99 to 1.09)	0.08
Pretreatment IOP (mm Hg)*		0.75 (0.69 to 0.82)	<0.0001
Axial length (mm)		1.12 (0.94 to 1.34)	0.21
LogMAR visual acuity		0.86 (0.39 to 1.89)	0.70
Disc photo CDR ×10		0.69 (0.55 to 0.87)	0.02
CDR asymmetry ×10		0.74 (0.48 to 1.15)	0.19
Visual field (MD)		1.14 (1.06 to 1.22)	p<0.0001
Central corneal thickness (μm)		1.01 (0.99 to 1.01)	0.1
Family history of glaucoma	No	1.00
	Yes	0.51 (0.29 to 0.91)	0.02
Wears glasses/contact	No	1.00
lenses?	Yes	2.59 (0.30 to 22.4)	0.39
Do you have any problems	No	1.00
with eyesight?	Yes	0.04 (0.02 to 0.08)	<0.0001
Pseudophakic in either eye	No	1.00
	Yes	0.29 (0.16 to 0.53)	<0.0001
Absolute refractive error (Dioptres)		1.16 (1.01 to 1.33)	0.03
Systolic BP (mm Hg)		1.00 (0.99 to 1.02)	0.60
Diastolic BP (mm Hg)		1.01 (0.99 to 1.04)	0.32
BMI (kg/m²)		1.02 (0.96 to 1.08)	0.50
Diabetes	No	1.00	0.59
	Yes	0.64 (0.13 to 3.22)
Self-reported health status	Excellent/very good	1.00
	Good	1.21 (0.71 to 2.05)	0.48
	Fair	1.04 (0.51 to 2.12)	0.93
	Poor	2.75 (0.70 to 10.9)	0.15

*Imputed data.
CDR, cup/disc ratio; HTG, high tension glaucoma; IOP, intraocular pressure; NTG, normal tension glaucoma; POAG, primary open angle glaucoma.