Table 2.

Prevalence of risk factors in non-Hispanic white, Hispanic, and African-American control women (top) and ovarian cancer cases (bottom)

FactorsNon-Hispanic whitesHispanicsAfrican AmericansP1bP2cP3d
Controlsa
 Nulliparous (%)23.7%13.7%16.8%<0.0010.0760.45
 Mean # births among parous (SD)2.5 (1.3)3.0 (1.7)2.7 (1.5)<0.0010.030.15
 Oral contraceptive use (no/<1 year; %)41.5%54.7%47.6%<0.0010.190.17
 Mean # months of OC use among users (SD)95.9 (74.9)81.0 (67.0)93.1 (74.2)0.0140.750.21
 No tubal ligation (%)85.9%73.7%69.2%<0.001<0.0010.36
 Endometriosis (%)7.5%3.4%5.6%0.0060.500.38
 Family history of ovarian cancer (%)2.5%3.4%2.8%0.370.980.93
 Talc use ≥1 year (%)30.4%28.9%44.1%0.610.00010.002
 Mean # years of talc use among users (SD)23.9 (17.4)21.3 (16.7)22.9 (17.0)0.150.670.55
Casese
 Nulliparous (%)27.8%17.9%16.4%<0.0010.0070.82
 Mean # births among parous (SD)2.5 (1.2)3.1 (1.7)2.8 (1.6)<0.0010.0030.24
 Oral contraceptive use (no/< 1 year; %)57.4%69.8%50.0%<0.0010.13<0.001
 Mean # months of OC use among users (SD)73.4 (61.1)59.8 (53.1)75.7 (66.7)0.0440.750.10
 No tubal ligation (%)90.6%83.8%80.5%<0.001<0.0010.49
 Endometriosis (%)11.1%5.5%9.4%0.0050.660.21
 Family history of ovarian cancer (%)5.1%4.9%7.0%0.960.480.50
 Talc use ≥1 year (%)41.2%38.6%47.7%0.450.190.10
 Mean # years of talc use among users (SD)27.5 (18.4)21.6 (16.9)26.6 (18.2)0.0010.710.069
  • aControls included: 1,868 non-Hispanic whites, 380 Hispanics, and 143 African Americans.

  • bP1df for differences between non-Hispanic whites and Hispanic controls (top)/P1df for differences between non-Hispanic whites and Hispanic cases (bottom).

  • cP1df for differences between non-Hispanic whites and African American controls (top)/P1df for differences between non-Hispanic whites and African American cases (bottom).

  • dP1df for differences between Hispanic and African American controls (top)/P1df for differences between Hispanic and African American cases (bottom).

    eCases included: 1,265 non-Hispanic whites, 308 Hispanics, and 128 African Americans.