Table 1

Characteristics of the study population (n=3390)

CharacteristicsNo (%)% for SMSA (1990)
Gender
 Male2438 (71.9)49.2
 Female952 (28.1)50.8
Age (in years)
 ≥5252 (7.4)8.3
 6–121216 (35.9)8.7
 13–10545 (16.1)8.1
 >201377 (40.6)74.9
Education of head of the household*
 < High school178 (5.3)11.8
 High school490 (14.5)22.8
 Some college1012 (29.9)24.9
 College graduate847 (25.0)30.5
 Postgraduate807 (23.8)10.1
 Unknown56 (1.7)
Household income
 <$10000453 (13.4)9.9
 $10000–24 999670 (19.8)22.3
 $25 000–49 999966 (28.5)36.1
 $50000–99 999803 (23.7)25.9
 ≥$100000224 (6.6)5.9
 Unknown275 (8.1)
Frequency of bicycling
 Daily2102 (62.0)
 Weekly884 (26.1)
 Monthly157 (4.6)
 <Monthly74 (2.2)
 Seldom163 (4.8)
 Unknown10 (0.3)
No of miles/week bicycling (n=1609; riders ≥15 only)
 <10324 (20.1)
 10–49646 (40.1)
 50–99292 (18.1)
 ≥100286 (17.8)
 Missing data61 (3.8)
  • *For SMSA, the education level is for all persons 25 years of age and older.