The enhanced online group component will be available to be accessed using the mHealth-Women's CoOp platform for participants in the enhanced arm. The purpose of this component is to allow for young women who use alcohol to interact with young women like them and also discuss issues related to substance use and sexual risk-taking via a guided conversation to allow for motivational and informational support. The virtual group component will include online live discussions moderated and monitored by a trained online facilitator.

Phosphatidylethanol (PEth) in dried blood spots (DBS) with concentration equal to or greater than 8 ng/mL is an indication of alcohol exposure in the last 2-4 weeks (approximately). Higher concentrations of PEth indicates higher recent alcohol consumption.

Phosphatidylethanol (PEth) in dried blood spots (DBS) with concentration equal to or greater than 8 ng/mL is an indication of alcohol exposure in the last 2-4 weeks (approximately). Higher concentrations of PEth indicates higher recent alcohol consumption.

Revised Risk Behavior Assessment (RRBA): Volume (grams of ethanol, accounting for different standard drink size), frequency of use, frequency of binge, heavy episodic drinking (4+ drinks/day).

Revised Risk Behavior Assessment (RRBA): Volume (grams of ethanol, accounting for different standard drink size), frequency of use, frequency of binge, heavy episodic drinking (4+ drinks/day).

Revised Risk Behavior Assessment (RRBA): Volume (grams of ethanol, accounting for different standard drink size), frequency of use, frequency of binge, heavy episodic drinking (4+ drinks/day).

World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for alcohol consumption problems via 8 items. Scores range from 0 to 39, and this score indicates level of risk for alcohol consumption problems. Scores from 0 to 10 indicate lower risk for alcohol problems, scores from 11 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for alcohol consumption problems via 8 items. Scores range from 0 to 39, and this score indicates level of risk for alcohol consumption problems. Scores from 0 to 10 indicate lower risk for alcohol problems, scores from 11 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for alcohol consumption problems via 8 items. Scores range from 0 to 39, and this score indicates level of risk for alcohol consumption problems. Scores from 0 to 10 indicate lower risk for alcohol problems, scores from 11 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

Number of participants living with HIV as assessed by OraQuick® ADVANCE Rapid HIV-1/2 Antibody Test with oral fluid, with an approximate 99.3% sensitivity & 99.8% specificity, which detects antibodies to HIV-1 and HIV-2.

Number of participants living with HIV as assessed by OraQuick® ADVANCE Rapid HIV-1/2 Antibody Test with oral fluid, with an approximate 99.3% sensitivity & 99.8% specificity, which detects antibodies to HIV-1 and HIV-2.

Revised Risk Behavior Assessment (RRBA): Condomless vaginal or anal sex, impaired sex (AOD use prior to or during sex), casual partners, sex trading, & concurrent partners (≥2 partners), other contraceptive use, & perception of risk, HIV, recent STIs

Revised Risk Behavior Assessment (RRBA): Condomless vaginal or anal sex, impaired sex (AOD use prior to or during sex), casual partners, sex trading, & concurrent partners (≥2 partners), other contraceptive use, & perception of risk, HIV, recent STIs

Revised Risk Behavior Assessment (RRBA): Condomless vaginal or anal sex, impaired sex (AOD use prior to or during sex), casual partners, sex trading, & concurrent partners (≥2 partners), other contraceptive use, & perception of risk, HIV, recent STIs

Dried blood spot (DBS) samples will be analyzed by quantification of drug concentrations by liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology using assays validated at the study laboratory.

Dried blood spot (DBS) samples will be analyzed by quantification of drug concentrations by liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology using assays validated at the study laboratory.

Revised Risk Behavior Assessment (RRBA): Self-reported past 30-day use, missed doses, and patterns of use

Revised Risk Behavior Assessment (RRBA): Self-reported past 30-day use, missed doses, and patterns of use

Revised Risk Behavior Assessment (RRBA): Self-reported past 30-day use, missed doses, and patterns of use

Easy@Home Multi-Drug Screen Test: Rapid urine-based drug screen to detect metabolites of recent drug use (>99% correlation to gas chromatography at 95% confidence level) 10-panel-amphetamine, benzodiazepines, barbiturates, cocaine, opiates, methamphetamine, ecstasy, methadone, phencyclidine, and marijuana. Each test has a control line region to serve as a procedural control and a test line region; results with only a line in the control region and without a line in the test region are classified as positive. Concentrations at or above the following cutoff concentrations indicate a positive result for the following substances: amphetamine (1000 ng/mL), benzodiazepines (300 ng/mL), barbiturates (300 ng/mL), cocaine (300 ng/mL), opiates (2000 ng/mL), methamphetamine (1000 ng/mL), ecstasy (500 ng/mL), methadone (300 ng/mL), phencyclidine (25 ng/mL), marijuana (50 ng/mL).

Easy@Home Multi-Drug Screen Test: Rapid urine-based drug screen to detect metabolites of recent drug use (>99% correlation to gas chromatography at 95% confidence level) 10-panel-amphetamine, benzodiazepines, barbiturates, cocaine, opiates, methamphetamine, ecstasy, methadone, phencyclidine, and marijuana. Each test has a control line region to serve as a procedural control and a test line region; results with only a line in the control region and without a line in the test region are classified as positive. Concentrations at or above the following cutoff concentrations indicate a positive result for the following substances: amphetamine (1000 ng/mL), benzodiazepines (300 ng/mL), barbiturates (300 ng/mL), cocaine (300 ng/mL), opiates (2000 ng/mL), methamphetamine (1000 ng/mL), ecstasy (500 ng/mL), methadone (300 ng/mL), phencyclidine (25 ng/mL), marijuana (50 ng/mL).

The World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for problems with drugs-such as marijuana, cocaine, amphetamine, and opioids-via 8 items. Scores range from 0 to 39, and this score indicates level of risk for drug use problems. Scores from 0 to 3 indicate lower risk for drug use problems, scores from 4 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

The World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for problems with drugs-such as marijuana, cocaine, amphetamine, and opioids-via 8 items. Scores range from 0 to 39, and this score indicates level of risk for drug use problems. Scores from 0 to 3 indicate lower risk for drug use problems, scores from 4 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

The World Health Organization's Alcohol, Smoking & Substance Use Involvement Scale (ASSIST) assesses risk for problems with drugs-such as marijuana, cocaine, amphetamine, and opioids-via 8 items. Scores range from 0 to 39, and this score indicates level of risk for drug use problems. Scores from 0 to 3 indicate lower risk for drug use problems, scores from 4 to 26 indicate moderate risk, and scores from 27 to 39 indicate high risk.

Multidimensional Scale of Perceived Social Support assesses perceived social support Multidimensional Scale of Perceived Social Support assesses perceived social support from family, friends, and others across a 12-item scale. Each item uses a 7-point scale (1 = very strongly disagree, 7 = very strongly agree). Items are summed and the total score is divided by the number of items. Scores range from 0 to 7. Higher scores indicate higher levels of social support.

Multidimensional Scale of Perceived Social Support assesses perceived social support from family, friends, and others across a 12-item scale. Each item uses a 7-point scale (1 = very strongly disagree, 7 = very strongly agree). Items are summed and the total score is divided by the number of items. Scores range from 0 to 7. Higher scores indicate higher levels of social support.

Multidimensional Scale of Perceived Social Support assesses perceived social support from family, friends, and others across a 12-item scale. Each item uses a 7-point scale (1 = very strongly disagree, 7 = very strongly agree). Items are summed and the total score is divided by the number of items. Scores range from 0 to 7. Higher scores indicate higher levels of social support.

Adaptation of the World Health Organization (WHO) violence scale: Self-reported occurrence of emotional, physical, and sexual violence with an additional financial abuse query, all combined into a 16-item scale. Each item uses a 3-point response scale (1 = Never, 2 = Sometimes, 3 = Frequently). Items are summed, and scores range from 16 to 48. Higher scores indicate more frequent occurrences of violence.

Adaptation of the World Health Organization (WHO) violence scale: Self-reported occurrence of emotional, physical, and sexual violence with an additional financial abuse query, all combined into a 16-item scale. Each item uses a 3-point response scale (1 = Never, 2 = Sometimes, 3 = Frequently). Items are summed, and scores range from 16 to 48. Higher scores indicate more frequent occurrences of violence.

Adaptation of the World Health Organization (WHO) violence scale: Self-reported occurrence of emotional, physical, and sexual violence with an additional financial abuse query, all combined into a 16-item scale. Each item uses a 3-point response scale (1 = Never, 2 = Sometimes, 3 = Frequently). Items are summed, and scores range from 16 to 48. Higher scores indicate more frequent occurrences of violence.