Table 1.
Sample Characteristics of High School Girls who Completed the 2007 Massachusetts Youth Risk Behavior Surveillance (YRBS) Survey (N=875), Stratified by Lifetime Sexual Behavior (behaviorally bisexual=10.5% vs. behaviorally-heterosexual=89.5%) and Sexual Identity (bisexual=8.1% vs. heterosexual=91.9%)+
| SEXUAL BEHAVIOR – Lifetime | SEXUAL IDENTITY – Current | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Total Sample (N = 875) | Behaviorally Bisexual (N = 91) 10.5 % |
Behaviorally Heterosexual (N = 784) 89.5 % |
Rao X2 | p-value | Bisexual Identity (N = 72) 8.1 % |
Heterosexual Identity (N = 803) 91.9 % |
Rao X2 | p-value | |
| DEMOGRAPHICS | |||||||||
|
| |||||||||
| Grade | |||||||||
| Lower Grades (Freshman or Sophomore) | 43.4 | 50.3 | 42.5 | 1.29 | 0.256 | 55.0 | 42.4 | 3.71 | 0.054 |
| Upper Grades (Junior or Senior) | 56.6 | 49.7 | 57.5 | 45.0 | 57.6 | ||||
| Race | |||||||||
| White/Caucasian | 76.4 | 73.9 | 76.7 | 1.38 | 0.848 | 68.9 | 77.0 | 4.81 | 0.307 |
| Black/African American | 5.6 | 3.8 | 5.8 | 4.9 | 5.6 | ||||
| Latino/Hispanic | 12.4 | 15.6 | 12.0 | 15.2 | 12.1 | ||||
| Asian/Pacific Islander | 2.4 | 3.0 | 2.4 | 5.1 | 2.2 | ||||
| Other Race/Ethnicity | 3.3 | 3.7 | 3.2 | 5.9 | 3.0 | ||||
|
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| SEXUAL IDENTITY & BEHAVIOR | |||||||||
|
| |||||||||
| Bisexual Identity | |||||||||
| Bisexual | 8.1 | 53.2 | 2.8 | 238.62 | <0.0001 | - | - | - | - |
| Heterosexual | 91.9 | 46.8 | 97.2 | - | - | - | - | ||
|
| |||||||||
| SEXUAL HEALTH-RELATED | |||||||||
|
| |||||||||
| Sex in the Past 3 Months | 56.9 | 60.1 | 56.6 | 0.27 | 0.605 | 71.1 | 55.7 | 6.17 | 0.013 |
| Unprotected Sex at Last Sexa,b | 22.8 | 35.0 | 21.4 | 5.42 | 0.020 | 39.2 | 21.3 | 11.94 | 0.001 |
| Alcohol and/or Drug Use During Last Sexb | 12.1 | 22.7 | 10.9 | 12.00 | 0.0005 | 18.8 | 11.5 | 5.62 | 0.018 |
| Early Sexual Debut (Age 14 and Younger) | 28.9 | 40.7 | 27.6 | 7.23 | 0.007 | 50.0 | 27.0 | 14.48 | 0.0001 |
| Four or More Sex Partners - Lifetime | 17.4 | 37.2 | 15.2 | 18.42 | <0.0001 | 38.0 | 15.5 | 15.17 | <0.0001 |
| History of Pregnancy - Lifetime | 18.5 | 19.1 | 18.4 | 0.02 | 0.895 | 19.2 | 18.4 | 0.03 | 0.871 |
| History of Forced/Unwanted Sex - Lifetime | 24.7 | 52.0 | 21.5 | 47.34 | <0.0001 | 51.7 | 22.3 | 23.88 | <0.0001 |
| HIV or STI Diagnosis - Lifetime | 2.4 | 4.9 | 2.1 | 2.24 | 0.134 | 6.2 | 2.1 | 4.07 | 0.044 |
| Tested for STI - Lifetime | 22.1 | 32.1 | 20.9 | 4.09 | 0.043 | 35.0 | 21.0 | 6.99 | 0.008 |
|
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| PSYCHOSOCIAL HEALTH RELATED | |||||||||
|
| |||||||||
| Depression – Past 12 Months | 38.7 | 67.0 | 35.3 | 59.38 | <0.0001 | 75.3 | 35.5 | 51.05 | <0.0001 |
| Binge drinking - Past 30 days | 39.3 | 44.1 | 38.7 | 0.93 | 0.334 | 48.8 | 38.4 | 3.53 | 0.061 |
| Drug use - Past 30 days | 31.0 | 51.9 | 28.6 | 13.70 | 0.0002 | 46.1 | 29.7 | 5.83 | 0.016 |
| Bullied – Past 12 Months | 23.0 | 39.4 | 21.0 | 21.12 | <0.0001 | 30.1 | 22.3 | 1.47 | 0.226 |
+
All frequencies and bivariate estimates are weighted.
a
Unprotected sex = sex without a condom during most recent sexual intercourse act
b
This is for the entire sample (not just those who had sex in past three months)
NE=Non-estimable because there is a zero cell