Table 5 Comparison of three angular parameters (θDF, θa, and θb) among three groups.

From: Biometric analysis of disc-fovea distance and optic disc diameter in premature infants using wide-field fundus imaging

	Group 1			Group 2			Group 3			p-value	Post-Hoc (Bonferroni)
	n	Mean	SD	n	Mean	SD	n	Mean	SD	p-value	Group 1 vs. 2	Group 1 vs. 3	Group 2 vs. 3
θDF, ◦
PMA 34 weeks	28	94.51	5.09	30	94.28	4.13	32	92.20	3.25	0.001*	0.986	0.008*	0.010*
PMA 35 weeks	26	94.04	5.70	28	96.69	4.82	34	92.60	4.17	< .001*	0.056	0.260	< .001*
PMA 36 weeks	27	95.13	5.72	29	96.68	4.79	26	93.32	4.59	0.001*	0.237	0.158	0.002*
PMA 37 weeks	27	95.80	5.72	28	97.25	5.83	34	93.61	4.71	0.001*	0.351	0.078	0.001*
PMA 38 weeks	25	95.13	5.88	30	97.42	5.65	27	94.72	5.02	0.005*	0.033*	0.916	0.008*
PMA 39 weeks	27	95.75	5.80	25	97.50	5.73	25	95.48	4.90	0.140	0.251	0.966	0.169
PMA 40 weeks	27	95.93	4.36	27	97.81	4.17	36	96.60	3.95	0.062	0.046*	0.649	0.223
θa, ◦
PMA 34 weeks	28	47.23	6.91	30	45.92	6.44	32	47.07	4.17	0.445	0.457	0.987	0.514
PMA 35 weeks	26	47.18	7.36	28	45.20	5.75	34	46.90	3.62	0.169	0.202	0.960	0.258
PMA 36 weeks	27	47.08	6.06	29	45.56	5.56	26	46.56	3.79	0.353	0.276	0.864	0.572
PMA 37 weeks	27	47.31	7.05	28	45.54	5.36	34	46.31	4.36	0.353	0.240	0.601	0.737
PMA 38 weeks	25	47.62	7.37	30	44.38	5.48	27	46.36	3.79	0.022*	0.010*	0.491	0.158
PMA 39 weeks	27	46.23	6.78	25	44.32	5.02	25	45.75	3.05	0.139	0.138	0.890	0.344
PMA 40 weeks	27	46.50	7.29	27	44.43	5.56	36	45.76	3.33	0.173	0.112	0.736	0.344
θb, ◦
PMA 34 weeks	28	37.63	6.17	30	38.25	4.62	32	39.90	4.13	0.030*	0.783	0.038*	0.153
PMA 35 weeks	26	37.30	8.18	28	37.21	4.59	34	39.08	4.15	0.123	0.996	0.225	0.164
PMA 36 weeks	27	36.43	6.48	29	36.76	4.36	26	39.06	3.86	0.005*	0.938	0.021*	0.043*
PMA 37 weeks	27	36.52	6.20	28	36.17	4.79	34	39.00	3.37	< .001*	0.927	0.017*	0.005*
PMA 38 weeks	25	35.81	5.88	30	36.93	5.22	27	38.96	3.24	< .001*	0.482	0.002*	0.036*
PMA 39 weeks	27	35.64	6.02	25	37.74	5.30	25	38.70	3.75	0.009*	0.289	0.007*	0.235
PMA 40 weeks	27	35.96	6.54	27	36.06	4.39	36	38.40	3.29	0.001*	0.994	0.014*	0.016*

*A p-value < 0.05 was considered statistically significant. SD, Standard deviation; PMA, Postmenstrual age; θDF = angle between the disc-fovea distance (DF) line and the vertical optic disc diameter (DD); θa = angle between the temporal superior arterial arcade and the DF line; θb = angle between the temporal inferior arterial arcade and the DF line.

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Table 5 Comparison of three angular parameters (θDF, θa, and θb) among three groups.

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