Peripapillary choroidal thickness in healthy Turkish subjects

Figures & data

Figure 1 The distribution of age of all subjects.

Figure 2 Box plot of peripapillary choroidal thickness values at each area measured by enhanced depth imaging optical coherence tomography.

Table 1 Mean peripapillary choroidal thickness values and pair-wise comparison of each peripapillary area

Choroidal thickness, µm
	Superior	Inferior	Nasal	Temporal
Mean ± SD	225±57	183±47	220±57	233±59
Range	124–390	93–327	120–408	112–370

Pair-wise comparison
	Sup-inf	Sup-bas	Sup-tem	Inf-nas	Inf-tem	Nas-tem
P*	<0.001	0.407	0.167	<0.001	<0.001	0.066

Note:

* Paired t-test.

Abbreviations: inf, inferior; sup, superior; nas, nasal; tem, temporal; bas, basal; SD, standard deviation.

Table 2 Correlation analyses of peripapillary choroidal thickness values between each peripapillary area

		Superior	Inferior	Nasal	Temporal
Superior	Correlation coefficient		0.766**	0.755**	0.690**
	P*		0.000	0.000	0.000
Inferior	Correlation coefficient	0.766**		0.735**	0.722**
	P*	0.000		0.000	0.000
Nasal	Correlation coefficient	0.755**	0.735**		0.603**
	P*	0.000	0.000		0.000
Temporal	Correlation coefficient	0.690**	0.722**	0.603**
	P*	0.000	0.000	0.000

Notes:

* Pearson’s correlation test.

** Correlation is significant at the 0.01 level (two tailed).

Table 3 Correlation analyses between peripapillary choroidal thickness values and age, axial length (AL), or spherical refraction (SR)

		Superior	Inferior	Nasal	Temporal
Age	Correlation coefficient	−0.021	−0.151	−0.063	−0.087
	P*	0.875	0.263	0.639	0.519
AL, mm	Correlation coefficient	−0.002	−0.154	0.025	−0.200
	P*	0.986	0.254	0.852	0.136
SR, D	Correlation coefficient	−0.114	−0.023	0.037	0.115
	P*	0.397	0.868	0.783	0.393

Notes:

* Pearson’s correlation test.

Abbreviation: D, diopter.

Table 4 Clinical features and choroidal thickness values of female and male subjects

Clinical feature	Females, mean ± SD	Males, mean ± SD	P*
Age, years	33±12	29±8	0.198
AL, mm	23.2±0.7	23.4±0.8	0.534
SE, D	−0.47±1.03	−0.37±1.10	0.738
Choroidal thickness, μm
Superior	219±52	229±60	0.507
Inferior	169±40	193±50	0.058
Nasal	200±51	236±57	0.016
Temporal	224±58	239±59	0.346

* Independent Student’s t-test.

Abbreviations: AL, axial length; D, diopter; SE, spherical equivalent.