Table 1. The difference between glucometer (No. 1–11) and laboratory method (No. 12) in retro-orbital blood glucose levels.

	Glucose range in No. 12 (mg/dL)
	0–99		100–199		200–299		300–
	(mg/dL)	(%)	(mg/dL)	(%)	(mg/dL)	(%)	(mg/dL)	(%)
Glucose value (No. 1–12) (mg/dL)	20.6 ±  3.4	34.7 ±  6.6	43.5 ±  8.8	30.5 ±  5.7	53.8 ±  11.1	20.1 ±  4.0	65.1 ±  13.6	16.5 ±  3.3
Glucose value (No. 2–12) (mg/dL)	30.1 ±  2.6	47.0 ±  5.3	42.9 ±  8.0	30.2 ±  5.2	60.5 ±  14.0	22.9 ±  4.9	101.6 ±  21.9	25.2 ±  5.3
Glucose value (No. 3–12) (mg/dL)	− 9.2 ±  3.3	− 10.3 ±  4.5	10.8 ±  8.3	7.4 ±  5.4	8.5 ±  9.1	3.0 ±  3.3	37.6 ±  19.1	8.5 ±  4.5
Glucose value (No. 4–12) (mg/dL)	− 7.7 ±  3.5	8.1 ±  5.0	10.8 ±  8.3	7.5 ±  5.4	8.3 ±  7.6	2.9 ±  2.8	35.1 ±  20.1	7.7 ±  4.8
Glucose value (No. 5–12) (mg/dL)	6.1 ±  3.2	11.9 ±  5.0	30.7 ±  8.7	21.5 ±  5.6	38.0 ±  9.7	14.2 ±  3.5	26.2 ±  10.9	6.8 ±  2.8
Glucose value (No. 6–12) (mg/dL)	− 8.5 ±  3.9	− 9.5 ±  5.3	− 11.3 ±  7.1	− 7.3 ±  4.5	− 26.6 ±  9.3	− 10.0 ±  3.3	− 52.4 ±  14.2	− 13.6 ±  3.7
Glucose value (No. 7–12) (mg/dL)	− 0.5 ±  3.1	2.3 ±  4.6	16.3 ±  8.9	11.3 ±  5.7	28.3 ±  11.0	10.5 ±  4.1	53.1 ±  19.7	12.8 ±  4.8
Glucose value (No. 8–12) (mg/dL)	13.0 ±  3.4	22.3 ±  5.5	29.0 ±  8.6	20.2 ±  5.6	37.7 ±  9.8	14.4 ±  3.6	48.0 ±  14.1	12.0 ±  3.4
Glucose value (No. 9–12) (mg/dL)	3.6 ±  3.2	8.7 ±  5.0	18.2 ±  8.8	13.1 ±  5.7	22.8 ±  10.2	8.7 ±  3.7	39.3 ±  13.7	9.7 ±  3.4
Glucose value (No. 10–12) (mg/dL)	− 1.1 ±  3.2	8.7 ±  4.6	23.8 ±  9.5	16.2 ±  6.0	42.8 ±  10.8	16.3 ±  3.9	64.2 ±  18.5	16.0 ±  4.7
Glucose value (No. 11–12) (mg/dL)	27.2 ±  3.5	44.1 ±  6.6	72.3 ±  11.3	49.7 ±  7.4	109.6 ±  13.9	41.3 ±  4.8	130.0 ±  14.0	33.5 ±  3.7

values are mean ±  SE. Sample number at − 100 mg/dL, 100–200 mg/dL, 200–300 mg/dL and 300– mg/dL glucose range is 29, 33, 13 and 10 respectively.