Table 1 Baseline characteristics of the Project Baseline Health Study (PBHS) cohort

n

2502

352

544

1605

Age at enrollment (years), median [IQR]

49.9 [35.0, 63.9]

58.2 [48.5, 68.7]

58.9 [46.9, 70.1]

43.2 [31.1, 59.1]

Age category

18–44

1031 (41.2)

67 (19.0)

121 (22.2)

842 (52.5)

45–64

889 (35.5)

170 (48.3)

239 (43.9)

480 (29.9)

>=65

582 (23.3)

115 (32.7)

184 (33.8)

283 (17.6)

Female

1375 (55.0)

189 (53.7)

289 (53.1)

897 (55.9)

Self-reported race

American Indian or Alaska Native

31 (1.2)

2 (0.6)

6 (1.1)

23 (1.4)

Asian

260 (10.4)

28 (8.0)

67 (12.3)

164 (10.2)

Black or African American

400 (16.0)

102 (29.0)

114 (21.0)

184 (11.5)

Native Hawaiian or Other Pacific Islander

27 (1.1)

5 (1.4)

5 (0.9)

17 (1.1)

Other

202 (8.1)

24 (6.8)

24 (4.4)

154 (9.6)

White

1582 (63.2)

191 (54.3)

328 (60.3)

1063 (66.2)

Enrollment site

California Health and Longevity Institute

500 (20.0)

25 (7.1)

79 (14.5)

396 (24.7)

Durham

485 (19.4)

98 (27.8)

120 (22.1)

266 (16.6)

Kannapolis

515 (20.6)

118 (33.5)

122 (22.4)

275 (17.1)

Stanford

1002 (40.0)

111 (31.5)

223 (41.0)

668 (41.6)

Body mass index (kg/m²)

28.4 (6.9)

33.9 (8.2)

29.3 (6.7)

26.9 (5.9)

Waist circumference (cm)

92.7 (17.1)

107.1 (18.3)

95.9 (15.5)

88.5 (15.4)

Hemoglobin A1c (%)

5.7 (1.0)

7.3 (1.7)

5.9 (0.2)

5.2 (0.3)

Blood glucose (mg/dl)

97.7 (36.2)

148.7 (72.8)

94.1 (14.1)

87.6 (11.4)

Systolic blood pressure (mmHg)

123.2 (16.0)

129.5 (16.1)

126.7 (16.0)

120.7 (15.4)

History of hypertension

671 (26.8)

205 (58.2)

194 (35.7)

272 (16.9)

Total cholesterol (mg/dL)

184.5 (39.5)

173.1 (44.6)

189.7 (38.9)

185.2 (38.1)

LDL cholesterol (mg/dL)

99.6 (33.7)

87.4 (36.4)

103.6 (34.6)

100.7 (32.2)

HDL cholesterol (mg/dL)

58.7 (19.0)

49.9 (17.1)

59.3 (18.0)

60.4 (19.2)

Triglycerides (mg/dL)

135.1 (101.7)

187.1 (143.8)

138.3 (103.6)

122.3 (84.5)