Table 1.

Description of study sample, overall, and stratified by age

TotalAge <30Age ≥30
n%n%n%P
Total1,658964694
Sociodemographics
Race/ethnicity (n = 1,654)
 Non-Hispanic Black1,21673.573976.747769.00.0002
 Non-Hispanic White20512.49910.310615.3
 Hispanic19611.911111.58512.3
 Other372.2141.5233.3
Highest education completed (n = 1,644)
 Less than high school38623.523224.315422.40.0087
 High school58135.333935.524235.2
 Some college41825.425827.016023.3
 Completed college25915.812713.313219.2
Yearly household income (n = 1,530)
 < $20,0001,09571.665975.743666.2<0.0001
 $20,000–40,00025616.713715.711918.1
 > $40,00017911.7758.610415.8
Health behaviors and general health status
Smoking (n = 1,653)
 Current31819.214715.317124.7<0.0001
 Former21012.7677.014320.6
 Never1,12568.174677.737954.7
Alcohol, average in last 5 years (n = 1,654)
 Rarely/never76446.250752.825737.1<0.0001
 At least once per month but less than once per week45427.526928.018526.7
 At least once per week43626.418519.325136.2
Screening history (n = 1,571)
 5 or more pap tests in last 5 years98662.856662.142063.70.5
 Less than 5 pap tests in last 5 years58537.234637.923936.3
Currently use condoms
 No98860.848651.250274.3<0.0001
 Sometimes23614.517218.1649.5
 Regularly40224.729230.711016.3
BMI (kg/m2; n = 1,407a)
 Underweight (<18.5)372.6273.3101.7<0.0001
 Normal weight (18.5–24.9)45532.331138.014424.5
 Overweight (25.0–29.9)36926.220825.416127.4
 Obese (≥30)54638.827333.327346.4
Reproductive history
Gravidity (n = 1,655)
 025415.418919.7659.4<0.0001
 1–268641.549251.219428.0
 3–443826.520521.323333.6
 5–619111.5606.213118.9
 ≥7865.2151.67110.2
Parity (n = 1,654)
 039023.629030.210014.4<0.0001
 1–279147.852955.126237.8
 3–435421.412212.723233.5
 ≥511914.3202.19914.3
Age at menarche (n = 1,633)
 7–1017010.410611.1649.40.19
 11–1267741.540642.727139.8
 13–1455333.931633.223734.8
 ≥1523314.312416.010916.0
Age at first pregnancy (n = 1,631)
Never pregnant25415.618919.9659.6<0.0001
 11–1636922.623624.813319.6
 17–1956434.634235.922232.7
 20–2432219.716917.815322.5
 25+1227.5161.710615.6
Lifetime oral contraceptive use (n = 1,647)
 Never43626.528329.615322.2<0.0001
 <3 mo28317.218619.49714.1
 3–11 mo22113.413714.38412.2
 12–35 mo30518.518419.212117.5
 At least 36 mo23534.116717.523534.1
Injectable contraceptive use (ever, n = 1,642)
 Yes, regularly51731.540842.7109915.9<0.0001
 Yes, sometimes21313.014515.2689.9
 Never91255.540342.250974.2
Any hormonal contraceptive use
 Yes1,40784.983987.056881.80.004
 No25115.112513.012618.2
Periods stopped (n = 1,652)
 Yes, natural menopause996.000.09914.4<0.0001b
 Yes, other reason301.840.4263.8
 No1,52392.296099.656381.8
Sexual history
Lifetime number of male sexual partners (n = 1,567)
 0–1 (1 woman claims 0)15810.19810.5609.40.15
 2–580251.249052.731249.0
 ≥660738.734236.836541.6
Age at first sexual intercourse
 5–143392122023.111917.9<0.0001
 15–166143841443.520030.1
 17–1841825.922523.719329.0
 19–201438.9666.97711.6
 21 or older1026.3262.77611.4
  • a231 women enrolled prior to 08/27/2009 were not asked about height and weight, and 20 other women did not answer.

  • bP-value for comparison between Yes and No.