Development and validation of a risk assessment model for prediabetes in China national diabetes survey

Table 3 Risk scores of risk factors for prediabetes

Predictor	Categories	Reference value	Base reference	Estimates of beta coefficients	P value	Points
Intercept				-6.1358	< 0.0001
Age	20-29	24.5	24.5	0.0274	< 0.0001	0
	30-39	34.5	24.5	0.0274	< 0.0001	2
	40-49	44.5	24.5	0.0274	< 0.0001	4
	50-59	54.5	24.5	0.0274	< 0.0001	6
	60-69	64.5	24.5	0.0274	< 0.0001	8
	70-79	74.5	24.5	0.0274	< 0.0001	10
	80-100	90	24.5	0.0274	< 0.0001	13
Middle, college or higher education	0	0	0	-0.2032	< 0.0001	0
	1	1	0	-0.2032	< 0.0001	-1
DM family history	0	0	0	0.3108	< 0.0001	0
	1	1	0	0.3108	< 0.0001	2
Waist circumference greater than normal limit1	0	0	0	0.1959	< 0.0001	0
	1	1	0	0.1959	< 0.0001	1
BMI	< 18.5	17.8	21.2	0.0761	< 0.0001	-2
	18.5-23.9	21.2	21.2	0.0761	< 0.0001	0
	24.0-27.9	25.95	21.2	0.0761	< 0.0001	3
	≥ 28	30.9	21.2	0.0761	< 0.0001	5
SBP	< 120	105	125	0.0117	< 0.0001	-2
	120-129	125	125	0.0117	< 0.0001	0
	130-139	135	125	0.0117	< 0.0001	1
	140-159	150	125	0.0117	< 0.0001	2
	≥ 160	169	125	0.0117	< 0.0001	4

¹Waist circumference greater than normal limit: ≥ 90 for men and ≥ 85 for women for Asian population and ≥ 102 cm in men and ≥ 88 cm in women for Mexican American, other Hispanic, non-Hispanic White and Black populations. DM: Diabetes mellitus, BMI: Body mass index, SBP: Systolic blood pressure.