BMC Bioinformatics

Table 2 Statistical analysis of numerical variables

From: Predicting diabetic retinopathy and identifying interpretable biomedical features using machine learning algorithms

	Retinopathy								p-value
	DM				Normal
	Min	Max	Mean	StdDev	Min	Max	Mean	StdDev
SBP	96	223	137.89	18.76	101	196	132.25	15.72	0.0188^*
DBP	55	112	78.75	10.39	28	101	75.73	11.24	0.0435^*
BMI	17.6	38.1	25.99	3.75	19.6	49.3	27.35	5.08	0.0278^*
Age	35	88	61.50	10.77	19	84	57.36	12.92	0.0120^*
≧65	65	88	71.63	5.25	65	84	72.25	4.89	0.6054^*
40–64	43	64	55.51	5.82	41	64	53.88	5.88	0.1217^*
< 40	35	39	36.75	2.06	19	38	28.75	6.31	0.0363^*
Duration	1	36	12.88	7.93	1	23	7.50	5.18	< 0.001^*

Minimum (Min), maximum (Max), mean, and standard deviation (StdDev) of numerical variables between DR and normal patients are calculated
^*Variables with p-value < 0.05 are highlighted

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