Table 2.

 Increase in IOP (mm Hg) for every 10 μm increase in CCT. Summary of previous findings regarding effect of CCT on IOP measurements

Author	Study type	Country	GAT	Tono-Pen	OBF	NCT
This study	Clinic based	United Kingdom	0.28	0.31	0.38	0.46
Ko et al, 20046	Clinic based	Taiwan	0.37		0.47	0.63
Siganos et al, 200436	Clinic based	Greece	0.26			0.39
Bhan et al, 20025	Clinic based	United Kingdom	0.23	0.10	0.28
Gunvant et al, 200421	Clinic based	United Kingdom	0.27		0.48
Morgan et al, 200312	Clinic based	United Kingdom			0.30
Shimmyo et al, 200322	Clinic based	United States	0.16
Eysteinsson et al, 200223	Population based	Iceland				0.22 (M)
						0.28 (F)
Dohadwala et al, 19984	Population based	Indian subcontinent		0.29 (M)
				0.12 (F)
Foster et al, 200324	Population based	Singapore	0.15 (R)
			0.18 (L)
Foster et al, 199825	Population based	Mongolia	0.18 (R)
			0.24 (L)
Wolfs et al, 199738	Population based	Netherlands	0.19
Nemesure et al, 200339	Population based	Barbados	none
Feltgen et al, 200116	Manometry	Germany	none
Foster et al, 200017	Manometry	Singapore	none
Ehlers, 19751	Manometry	Denmark	0.71

M, male; R, right eye; F, female; L, left eye.