Table 1

Demographic characteristics of study subjects, American Indian dysplasia study, 1994–1997

Controls (n = 160) No. (%)Cases (n = 81) No. (%)Ps
Age (years)
 18–2129 (18.1)17 (21.0)0.86
 22–3099 (61.9)49 (60.5)
 31–4532 (20.0)15 (18.5)
Years of education
 12 years or below47 (29.3)31 (38.3)0.35
 13–15 years89 (55.6)38 (46.9)
 16+ years24 (15.1)12 (14.8)
Annual family income
 <$10,00038 (23.8)32 (39.5)0.005
 $10,000–$19,99941 (25.6)25 (30.9)
 ≥$20,00081 (50.6)24 (29.6)
Marital status
 Single, never married46 (28.8)26 (32.1)0.03
 Married or with partner106 (66.2)45 (55.6)
 Divorced6 (3.8)3 (3.7)
 Separated2 (1.2)7 (8.6)
Tribal affiliation
 Southwestern146 (91.3)72 (88.9)0.56
 Other14 (8.7)9 (11.1)
Blood quantuma
 Full119 (74.4)63 (77.8)0.26
 ¾15 (9.4)3 (3.7)
 ½17 (10.6)12 (14.8)
 ¼7 (4.4)1 (1.2)
 <¼2 (1.2)2 (2.5)
Reason for screening
 Family planning02 (2.5)<0.001
 Annual exam140 (87.5)45 (55.6)
 Suspected STD1 (0.6)1 (1.2)
 Planned follow-up1 (0.6)9 (10.8)
 Otherb18 (11.3)24 (29.9)
  • a Blood quantum is amount of Indian blood reported by study subjects.

  • b Other reasons for screening included postpartum visits, pregnancy testing, and vaginitis.