Table 3.

Characteristics of patients with retinitis pigmentosa included in the subanalysis and comparison between the large- and small-angle groups.

		Total	Large-angle hroup	Small-angle group	P
Number of patients		30	7	23
Age, years (range)		42.4 ± 18.7 (10–75)	45.3 ± 23.8 (10–75)	41.5 ± 17.4 (11–75)	0.65
Sex (M/F)		18/12	3/4	15/8	0.39#
Axial length (n = 19), mm		23.6 ± 1.6	23.1 ± 1.1	23.8 ± 1.7	0.38
LogMAR		0.13 ± 0.28	0.34 ± 0.32	0.06 ± 0.24	0.02*
MD value, dB		−16.2 ± 10.3	−19.8 ± 8.9	−15.1 ± 10.6	0.30
Interocular difference	LogMAR	0.10 ± 0.12	0.16 ± 0.14	0.08 ± 0.11	0.11
	MD value, dB	1.4 ± 1.8	2.2 ± 2.0	1.2 ± 1.8	0.20
Residual GP area, cm2		63.3 ± 59.5	35.8 ± 55.5	71.7 ± 59.3	0.17
Deviation at near distance, degrees	Horizontal	6.5 ± 6.1	14.6 ± 7.6	4.1 ± 2.6	0.01*
	Vertical	0.3 ± 0.8	0.8 ± 1.4	0.2 ± 0.5	0.29
Deviation at far distance, degrees	Horizontal	3.4 ± 4.7	7.4 ± 6.6	2.2 ± 3.3	0.009*
	Vertical	0.4 ± 0.8	0.6 ± 1.3	0.3 ± 0.6	0.43
Phoria/phoria–tropia/tropia		22/3/5	2/2/3	20/1/2	0.003*##

Data are presented as means ± standard deviations where applicable.

Large-angle group: patients with a horizontal ocular alignment of ≥10° at near distance.

Small-angle group: patients with a horizontal ocular alignment of <10° at near distance.

Residual GP area: total residual visual field area for the right and left eyes, as determined by Goldmann perimetry.

logMAR, logarithm of the minimal angle of resolution; MD value, mean deviation value obtained using the 10-2 Swedish Interactive Threshold Algorithm standard program of the Humphrey field analyser.

Axial length and logMAR data are presented as average values for the right and left eyes.

Ocualr deviation was analysed using absolute values, regardless of the strabismus type.

^#Chi-square test; ^##Chi-square trend test; remaining, t-tests.

*Statistically significant (P < 0.05).