. Author manuscript; available in PMC: 2011 Jul 22.

Published in final edited form as: N Engl J Med. 2010 Jul 7;363(4):321–330. doi: 10.1056/NEJMoa0907897

Table 1.

Baseline Characteristics of CARDIA Study Participants, According to Sex.^*

Characteristic	Men (N = 309)	Women (N = 468)
Age (yr)	24.5±3.7	24.4±3.9
BMI^†	24.5±4.1	26.4±6.3
Education (yr)	13.1±2.0	13.2±1.8
Median income category ($)	25,000–34,999	16,000–24,999
No. of lifetime pack-years of smoking	1.8±3.4	1.7±3.5
Pulmonary function (liters)
FEV₁	3.83±0.56	2.85±0.42
FVC	4.63±0.70	3.34±0.50
African ancestry (%)	85.0±10.1	85.1±9.6

Plus–minus values are means ±SD. CARDIA denotes the Coronary Artery Risk Development in Young Adults study, FEV₁ forced expiratory volume in 1 second, and FVC forced vital capacity.

^†

The body-mass index (BMI) is the weight in kilograms divided by the square of the height in meters.