. 2019 Aug 14;19:184. doi: 10.1186/s12886-019-1196-9

Table 4.

Comparison of total hemorrhage area, hemorrhage lesion number, maximum hemorrhage area, total exudation area, exudation lesion number, and maximum exudation area among different DR stages

Dependent variable	Group		Mean difference	Standard error	P	95% Confidence Interval
Dependent variable	Group		Mean difference	Standard error	P	Lower limit	Upper limit
Hemorrhage area	^aGroup 1	^aGroup 2	−14,297.535*	3042.766	< 0.001	−20,344.39	− 8250.68
	^aGroup 1	^aGroup 3	−15,558.166*	3262.459	< 0.001	−22,041.62	− 9074.71
	Group 2	Group 1	14,297.535*	3042.766	< 0.001	8250.68	20,344.39
	Group 2	Group 3	− 1260.631	3464.848	.717	− 8146.29	5625.03
	Group 3	Group 1	15,558.166*	3262.459	< 0.001	9074.71	22,041.62
	Group 3	Group 2	1260.631	3464.848	.717	− 5625.03	8146.29
Hemorrhage lesion number	Group 1	Group 2	−23.364*	2.721	< 0.001	−28.77	−17.96
	Group 1	Group 3	−8.091*	2.918	.007	−13.89	−2.29
	Group 2	Group 1	23.364*	2.721	< 0.001	17.96	28.77
	Group 2	Group 3	15.273*	3.099	< 0.001	9.11	21.43
	Group 3	Group 1	8.091*	2.918	.007	2.29	13.89
	Group 3	Group 2	−15.273*	3.099	< 0.001	−21.43	−9.11
Maximum hemorrhage area	Group 1	Group 2	− 2959.526*	1039.915	.006	− 5026.14	− 892.91
	Group 1	Group 3	− 6497.670*	1114.998	< 0.001	− 8713.49	− 4281.85
	Group 2	Group 1	2959.526*	1039.915	.006	892.91	5026.14
	Group 2	Group 3	− 3538.144*	1184.168	.004	− 5891.43	− 1184.86
	Group 3	Group 1	6497.670*	1114.998	< 0.001	4281.85	8713.49
	Group 3	Group 2	3538.144*	1184.168	.004	1184.86	5891.43
Exudation area	Group 1	Group 2	− 5093.435	2754.178	.068	−10,566.79	379.92
	Group 1	Group 3	−13,566.408*	2953.034	< 0.001	−19,434.94	− 7697.87
	Group 2	Group 1	5093.435	2754.178	.068	− 379.92	10,566.79
	Group 2	Group 3	− 8472.973*	3136.228	.008	−14,705.57	− 2240.38
	Group 3	Group 1	13,566.408*	2953.034	< 0.001	7697.87	19,434.94
	Group 3	Group 2	8472.973*	3136.228	.008	2240.38	14,705.57
Exudation lesion number	Group 1	Group 2	−14.655*	4.399	.001	−23.40	−5.91
	Group 1	Group 3	−5.957	4.716	.210	−15.33	3.42
	Group 2	Group 1	14.655*	4.399	.001	5.91	23.40
	Group 2	Group 3	8.699	5.009	.086	−1.26	18.65
	Group 3	Group 1	5.957	4.716	.210	−3.42	15.33
	Group 3	Group 2	−8.699	5.009	.086	−18.65	1.26
Maximum exudation area	Group 1	Group 2	− 1043.818	1131.248	.359	− 3291.94	1204.30
	Group 1	Group 3	− 6505.911*	1212.926	< 0.001	− 8916.35	− 4095.48
	Group 2	Group 1	1043.818	1131.248	.359	− 1204.30	3291.94
	Group 2	Group 3	− 5462.093*	1288.171	< 0.001	− 8022.06	− 2902.12
	Group 3	Group 1	6505.911*	1212.926	< 0.001	4095.48	8916.35
	Group 3	Group 2	5462.093*	1288.171	< 0.001	2902.12	8022.06

*p < 0.05

^a Group 1, mild NPDR and moderate NPDR; group 2, severe NPDR; group 3, PDR