Table 2.
Weighted Multivariable Logistic Regression Models: Regressing Sexual Health Indicators on Behaviorally-Bisexual vs. Behaviorally-Heterosexual and Bisexual Identity vs. Heterosexual Identity (Grade- and Race-Adjusted)
| Sexual Health Indicator 1: Unprotected Intercourse at Last Sex | Sexual Health Indicator 2: Alcohol and/or Drug Use at Last Sex | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Model 1A | Model 1B | Model 1C | Model 2A | Model 2B | Model 2C | |||||||
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| aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | |
|
| ||||||||||||
| Behaviorally Bisexual | 2.22 (1.26, 3.92) | .006 | - | - | 0.76 (0.37) | .039 | 2.30 (1.33, 3.99) | .003 | - | - | 0.78 (0.47) | .094 |
| Bisexual Identity | - | - | 2.89 (1.77, 4.71) | <.0001 | 1.45 (0.48) | .002 | - | - | 1.68 (0.98, 2.87) | .057 | −0.41 (0.80) | .607 |
| Interaction Term | - | - | - | - | −1.27 (0.70) | .070 | - | - | - | - | 0.49 (1.08) | .648 |
| Covariates: | ||||||||||||
| Nonwhite Race/Ethnicity | 1.46 (0.83, 2.58) | .188 | 1.44 (0.81, 2.55) | .214 | 0.38 (0.29) | .196 | 1.20 (0.74, 1.96) | .464 | 1.19 (0.73, 1.96) | .487 | 0.18 (0.25) | .466 |
| Upper Grades* | 2.94 (2.11, 4.08) | <.0001 | 3.04 (2.20, 4.20) | <.0001 | 1.13 (0.17) | <.0001 | 1.68 (0.90, 3.15) | .106 | 1.67 (0.90, 3.09) | .101 | 0.52 (0.32) | .111 |
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| Sexual Health Indicator 3: Early Sexual Debut (Age 14 and under) | Sexual Health Indicator 4: Four or More Sexual Partners - Lifetime | |||||||||||
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| Model 3A | Model 3B | Model 3C | Model 4A | Model 4B | Model 4C | |||||||
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| aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | |
|
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| Behaviorally Bisexual | 1.67 (1.08, 2.57) | .02 | - | - | 0.25 (0.36) | .474 | 3.44 (1.95, 6.08) | <.0001 | - | - | 1.10 (0.38) | .003 |
| Bisexual Identity | - | - | 2.30 (1.38, 3.84) | .001 | 1.03 (0.49) | .038 | - | - | 3.57 (1.80, 7.09) | .0003 | 1.17 (0.72) | .106 |
| Interaction Term | - | - | - | - | −0.52 (0.78) | .505 | - | - | - | - | −0.84 (0.80) | .295 |
| Covariates: | ||||||||||||
| Nonwhite Race/Ethnicity | 2.09 (1.44, 3.05) | .0001 | 2.06 (1.42, 3.01) | .0002 | 0.73 (0.19) | <.0001 | 1.20 (0.79, 1.82) | .399 | 1.17 (0.78, 1.77) | .451 | 0.17 (0.21) | .421 |
| Upper Grades* | 0.49 (0.27, 0.83) | <.0001 | 0.50 (0.36, 0.68) | <.0001 | −0.70 (0.16) | <.0001 | 2.21 (1.36, 3.60) | .001 | 2.26 (1.43, 3.55) | .0004 | 0.83 (0.24) | .0005 |
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| Sexual Health Indicator 5: History of Pregnancy – Lifetime | Sexual Health Indicator 6: History of Forced or Unwanted Sex – Lifetime | |||||||||||
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| Model 5A | Model 5B | Model 5C | Model 6A | Model 6B | Model 6C | |||||||
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| aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p- value | aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | |
|
| ||||||||||||
| Behaviorally Bisexual | 1.19 (0.63, 2.27) | .589 | - | - | 0.14 (0.47) | .763 | 4.04 (2.61, 6.26) | <.0001 | - | - | 1.30 (0.33) | <.0001 |
| Bisexual Identity | - | - | 1.33 (0.72, 2.49) | .365 | 0.42 (0.64) | .511 | - | - | 3.81 (2.06, 7.04) | <.0001 | 1.13 (0.44) | .009 |
| Interaction Term | - | - | - | - | −0.33 (0.80) | .679 | - | - | - | - | −0.88 (0.53) | .100 |
| Covariates: | ||||||||||||
| Nonwhite Race/Ethnicity | 0.66 (0.37, 1.20) | .171 | 0.66 (0.36, 1.20) | .173 | −0.41 (0.30) | .173 | 1.08 (0.78, 1.49) | .660 | 1.04 (0.75, 1.45) | .806 | 0.06 (0.17) | .717 |
| Upper Grades* | 4.24 (2.73, 6.60) | <.0001 | 4.27 (2.75, 6.64) | <.0001 | 1.45 (0.23) | <.0001 | 0.87 (0.59, 1.29) | .499 | 0.88 (0.60, 1.30) | .528 | −0.11 (0.20) | .568 |
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| Sexual Health Indicator 7: History of HIV or STI Diagnosis – Lifetime | Sexual Health Indicator 8: History of STI Testing – Lifetime | |||||||||||
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| Model 7A | Model 7B | Model 7C | Model 8A | Model 8B | Model 8C | |||||||
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| aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p- value | aOR (95% CI) | p-value | aOR (95% CI) | p-value | B (SE) | p-value | |
|
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| Behaviorally Bisexual | 2.35 (0.81, 6.81) | .117 | - | - | −0.06 (1.07) | .957 | 2.00 (1.13, 3.53) | 0.017 | - | - | 0.72 (0.35) | .041 |
| Bisexual Identity | - | - | 2.96 (1.08, 8.11) | .034 | 0.38 (0.96) | .693 | - | - | 2.37 (1.35, 4.18) | .003 | 1.24 (0.43) | .004 |
| Interaction | - | - | - | - | 0.98 (1.66) | .554 | - | - | - | - | −1.20 (0.51) | .018 |
| Covariates: | ||||||||||||
| Nonwhite Race/Ethnicity | 2.39 (1.02, 5.61) | .045 | 2.33 (1.01, 5.36) | .047 | 0.84 (0.43) | .049 | 1.69 (1.06, 2.69) | 0.028 | 1.67 (1.05, 2.67) | .032 | 0.53 (0.24) | .026 |
| Upper Grades* | 1.03 (0.33, 3.26) | .954 | 1.08 (0.34, 3.39) | .901 | 0.06 (0.58) | .914 | 2.61 (1.75, 3.89) | <.0001 | 2.66 (1.79, 3.94) | <.0001 | 0.99 (0.20) | <.0001 |
*
Upper Grades = 11th and 12 grades (referent = 9th and 10th grades)