Table 1

Baseline characteristics according to between 2-hour plasma glucose during the 75 g oral glucose tolerance test (OGTT) in NHANES 2005–2014 followed through 2015 (N=8795)

Variables2-hour plasma glucose during the 75 g OGTT
Normal glucose tolerance
<140 mg/dL
(<7.8 mmol/L)
Impaired glucose tolerance
140–<200 mg/dL
(7.8–<11.1 mmol/L)
Diabetes
≥200 mg/dL
(≥11.1 mmol/L)
P value
Total, n67541471570
Age (years)44.7±16.556.7±16.962.0±15.10.005
Sex (male), n (%)3350 (49.6)722 (49.1)287 (50.4)0.87
Race/ethnicity, n (%)<0.001
 Non-Hispanic white3161 (46.8)724 (49.2)280 (49.1)
 Non-Hispanic black1300 (19.3)222 (15.1)74 (13.0)
 Mexican-American1048 (15.5)257 (17.5)105 (18.4)
 Others1245 (18.4)268 (18.2)111 (19.5)
Education status, n (%)<0.001
 Less than 9th grade514 (7.6)230 (15.6)94 (16.5)
 9th–11th grade944 (14.0)226 (15.4)98 (17.2)
 High school or GED1502 (22.2)346 (23.5)165 (29.0)
 Higher than high school3794 (56.2)669 (45.5)213 (37.4)
Married, n (%)3510 (52.0)822 (55.9)330 (57.9)0.001
Smoking, n (%)<0.001
 Never3797 (56.2)785 (53.4)295 (51.8)
 Current1507 (22.3)243 (16.5)98 (17.2)
 Former1450 (21.5)443 (30.1)177 (31.0)
BMI (kg/m2)27.9±6.430.1±7.130.8±6.5<0.001
eGFR (mL/min/1.73 m2)98.3±23.389.0±25.485.3±26.6<0.001
Cancer, n (%)470 (7.0)190 (12.9)80 (14.0)<0.001
Hypertension, n (%)1748 (26.0)679 (46.2)302 (53.0)<0.001
Cardiovascular disease, n (%)285 (4.2)129 (8.8)73 (12.8)<0.001
Stroke, n (%)143 (2.1)55 (3.7)37 (6.5)<0.001
Statin prescription, n (%)727 (10.8)314 (21.4)159 (27.9)<0.001
Sleep disorder, n (%)1626 (24.1)364 (24.8)151 (26.5)0.40
Sleep duration6.8±1.46.9±1.56.9±1.50.96
  • BMI, body mass index; eGFR, estimated glomerular filtration rate; GED, General Educational Development; NHANES, National Health and Nutrition Examination Survey.