Table 1.

Demographic and laboratory test information on the cohort of people with T1DM at the time of first DR screening event.

Age range	0–6		6–12		12–18		Whole cohort
Description	Count	Median (LQ, UQ)	Count	Median (LQ, UQ)	Count	Median (LQ, UQ)	Count	Median (LQ, UQ)
Total n	851 (100%)		1747 (100%)		1592 (100%)		4190 (100%)
Female gender	425 (50%)		914 (52%)		631 (40%)		1971 (47.0%)
Age at diagnosis (years)	851 (100%)	3.47 (2.2, 4.8)	1747 (100%)	9.5 (8.0, 10.8)	1592 (100%)	14.2 (13.0, 15.9)	4190 (100%)	10.6 (7.0, 13.4)
Age at screening (years)	851 (100%)	14.2 (12.3, 21.4)	1747 (100%)	14.1 (12.4, 20.6)	1592 (100%)	17.9 (15.2, 24.0)	4190 (100%)	16.3 (13.0, 22.3)
Diabetes duration (years)	851 (100%)	11.3 (8.9, 17.9)	1747 (100%)	5.6 (3.1, 11.4)	1586 (100%)	2.7 (0.8, 9.8)	4186 (99.9%)	6.6 (2.3, 12.3)
HbA1c (mmol/mol)	390 (46%)	74.0 (65.0, 86.8)	822 (47%)	73.7 (63.9, 87.7)	743 (47%)	70.4 (56.2, 84.6)	1957 (46.7%)	72.6 (61.7, 86.0)
HbA1c (%)	390 (46%)	8.9 (8.1, 10.1)	822 (47%)	8.9 (8.0, 10.2)	743 (47%)	8.6 (7.3, 9.9)	1957 (46.7%)	8.8 (7.8, 10.0)
Systolic pressure (mmHg)	383 (45%)	120.0 (110.0, 130.0)	814 (47%)	119.0 (110.0, 128.0)	931 (59%)	120.0 (110.0, 130.0)	2129 (50.8%)	120.0 (110.0, 130.0)
Diastolic pressure (mmHg)	383 (45%)	70.0 (62.0, 78.0)	814 (47%)	70.0 (63.0, 78.0)	931 (59%)	70.0 (65.0, 80.0)	2129 (50.8%)	70.0 (61.0, 79.0)
Cholesterol (mmol/l)	245 (29%)	4.5 (3.9, 5.1)	507 (29%)	4.4 (3.8, 5.1)	639 (40%)	4.3 (3.7, 5.0)	1392 (33.2%)	4.4 (3.8, 5.1)
LDL (mmol/l)	144 (17%)	2.5 (2.0, 3.0)	302 (17%)	2.3 (1.8, 2.9)	406 (26%)	2.3 (1.8, 2.9)	853 (20.4%)	2.3 (1.8, 2.9)
HDL (mmol/l)	162 (19%)	1.5 (1.3, 1.7)	334 (19%)	1.4 (1.2, 1.7)	438 (28%)	1.3 (1.1, 1.6)	935 (22.3%)	1.4 (1.2, 1.7)
Creatinine (µmol/l)	203 (24%)	76.0 (64.5, 89.0)	469 (27%)	73.0 (63.0, 85.0)	656 (41%)	74.0 (63.0, 86.0)	1330 (31.7%)	74 (63, 86)
BMI (kg/m2)	294 (35%)	23.8 (21.12, 27.2)	611 (35%)	23.4 (21.1, 26.7)	784 (49%)	24.0 (21.3, 27.0)	1691 (40.4%)	23.8 (21.1, 26.9)