Table 1—

Characteristics of study subjects by case and control status

CharacteristicCase subjects (n = 901)Control subjects (n = 913)P value
Mean age (years ± SD)66.1 ± 6.266.2 ± 6.30.835
Married or living as married588 (65.4%)576 (63.2%)0.333
Ethnicity0.106
 Caucasian838 (93.2%)841 (92.3%)
 African-American19 (2.1%)23 (2.6%)
 Asian-American21 (2.4%)36 (4.0%)
 Other19 (2.1%)10 (0.6%)
Educational level0.091
 ≤12 years373 (41.6%)368 (40.6%)
 >12 years to completed college392 (43.4%)416 (45.6%)
 More than college133 (15.0%)127 (14.0%)
Annual income0.865
 <$25,000293 (37.4%)293 (36.9%)
 $25,000–50,000361 (46.1%)376 (47.3%)
 >$50,000130 (16.6%)126 (15.6%)
  • Data are n (%).