Central corneal thickness and intraocular pressure in the Cameroonian nonglaucomatous population

Figures & data

Figure 1 Intraocular pressure according to age (n = 970 eyes).

Abbreviations: LE, left eye; RE, right eye.

Table 1 Central corneal thickness according to gender

Gender	RE CCT		LE CCT		RE + LE CCT
	Average	n	Average	n	Average	n
Male	530.52 ± 34.97	163	530.02 ± 34.80	163	530.27 ± 34.83	326
Female	528.67 ± 36.40	322	527.27 ± 36.47	322	527.97 ± 36.41	644
Total	529.29 ± 35.90	485	528.19 ± 35.90	485	528.74 ± 35.89	970
P**	0.593		0.426		0.347

Abbreviations: CCT, central corneal thickness; LE, left eye; RE, right eye.

Notes:

** independent-samples t-test.

Figure 2 Scattergramof central corneal thickness (CCT) versus age (n = 970 eyes).

Figure 3 Central corneal thickness according to age (n = 970 eyes).

Abbreviations: LE, left eye; RE, right eye.

Table 2 Central corneal thickness according to age and gender

Age (years)	Male		Female
	RE CCT	LE CCT	RE CCT	LE CCT
<20	539.85 ± 38.37 (39)	539.90 ± 37.50 (39)	536.66 ± 36.95 (89)	535.36 ± 38.16 (89)
20–39	527.37 ± 32.44 (66)	526.26 ± 31.38 (66)	528.02 ± 38.35 (148)	526.66 ± 37.47 (148)
40–59	528.66 ± 35.63 (47)	529.40 ± 36.02 (47)	525.90 ± 30.08 (67)	524.10 ± 30.71 (67)
≥60	524.18 ± 32.71 (11)	520.18 ± 36.32 (11)	504.83 ± 27.23 (18)	503.00 ± 27.69 (18)
P*	0.285	0.187	0.006	0.005

Abbreviations: CCT, central corneal thickness; LE, left eye; RE, right eye.

Note:

* One-way ANOVA.

Table 3 Multiple linear regression of central corneal thickness

Variables	RE			LE			Combined RE and LE
	Coefficient	CI	Pvalue*	Coefficient	CI	Pvalue*	Coefficient	CI	Pvalue*
Age	0.40	0.60–0.21	0.000	0.43	0.62–0.23	0.000	−0.42	0.55–0.28	0.000
IOP	3.88	2.86–4.91	0.000	4.12	3.11–5.13	0.000	4.00	3.30–4.71	0.000
Sex
Male	3.26	3.13–9.64	0.317	3.45	2.88–9.78	0.285	3.37	1.12–7.85	0.141
Female	Ref1	Ref		Ref	Ref		Ref	Ref
R-square		0.123			0.138			0.130

Abbreviations: CCT, central corneal thickness; CI, confidence interval; IOP, intraocular pressure; LE, left eye; RE, right eye.

Notes:

* student’s t- test;

1 The modality « Female » is taken here like reference.

Figure 4 Intraocular pressure (IOP) according to central corneal thickness (CCT) in norm standards (n = 970 eyes).

Abbreviations: LE, left eye; RE, right eye.

Figure 5 Scattergram between central corneal thickness (CCT) and intraocular pressure (IOP) (n = 970 eyes).

Abbreviations: LE, left eye; RE, right eye.

Table 4 Multiple linear regression of intraocular pressure

Variables	RE			LE			Combined RE and LE
	Coefficient	CI	Pvalue*	Coefficient	CI	Pvalue*	Coefficient	CI	Pvalue*
Age	0.026	0.010–0.042	0.002	0.032	0.016–0.048	0.000	0.029	0.017–0.040	0.000
CCT	0.027	0.020–0.034	0.000	0.029	0.022–0.036	0.000	0.028	0.023–0.033	0.000
Sex
Male	−0.243	−0.77–0.29	0.367	−0.093	−0.62–0.44	0.729	−0.168	−0.54–0.21	0.378
Female	Ref1	Ref		Ref	Ref		Ref	Ref
R square		0.111			0.130			0.120

Abbreviations: CCT, central corneal thickness; CI, confidence interval; LE, left eye; RE, right eye.

Notes:

* student’s t-test.

1 The modality « Female » is taken here like reference.