In-the-kNOW (Novel Approaches to Optimizing Women's Health): A Mobile Application to Optimize HIV Prevention and Sexual/Reproductive Health Communication Among Black Women in the Southern U.S.

Retention Rate

时间窗: 4 months

Feasibility is assessed with the retention rate of participants in each study arm. Quantitative survey and qualitative interview data to determine acceptability of both the mobile app and the control condition.

App User Retention Rate

时间窗: 4 months

App user retention rate was calculated among participants only in the intervention group. App user retention was measured by comparing the number of first-time app opens to the number of app removals.

System Usability Scale (SUS)

时间窗: 4 months

The System Usability Scale (SUS) is a validated industry-standard scale used to evaluate a variety of products and services, including websites, mobile phones, computer software, and more. It is a quick, 10-item questionnaire for gauging perceived usability, resulting in a score from 0-100, where higher is better, with 68 as the average benchmark, and scores above 80 considered excellent; it's calculated by summing adjusted responses to positive/negative statements. Lower scores indicate low usability, and higher scores indicate good usability. \*Only participants in the treatment group received these questions.

Impact Scale

时间窗: 4 months

Impact is evaluated using three items that assess how the SavvyHER app influences Black women's quality of life and their sexual and reproductive health. Items prompt participants to rate their agreement with statements such as "I think SavvyHER will be a positive addition to sexual and reproductive health resources for Black women" and "I think SavvyHER will improve the Quality of Life for Black women," with responses on a scale from "strongly disagree" (1) to "strongly agree" (5). Scores were calculated by averaging the responses. Impact scores ranged from 1 to 5, where 1 indicates the least perceived impact, and 5 indicates the most positive perceived impact. A high impact score indicates that the users perceive the technology as having a strong, positive, real-world effect on their relevant outcomes or performance. Higher scores indicate that the mHealth app had a more positive impact on their quality of life and health.

Perceived Usefulness (PU) Scale

时间窗: 4 months

Perceived usefulness (PU) is defined as the extent to which a person believes that using a system or tool will help in reaching their goals. The PU of SavvyHER was determined from participants' responses to nine survey items assessing the app's impact on their quality of life and health management. Survey items used 5-point Likert scales, ranging from "strongly disagree" (1) to "strongly agree" (5). These scores are calculated by averaging the responses across PU items. PU scores ranged from 1 to 5, with higher scores indicating a more positive perception of the technology being evaluated.

Perceived Ease of Use (PEOU) Scale

时间窗: 4 months

Perceived ease of use (PEOU) is the extent to which a system or tool is easy to learn and use. PEOU is assessed using five survey items rated on a 5-point Likert scale that ask about people's experiences learning to operate a technological system or tool. Sample items prompt participants to rate their agreement with statements such as "Learning to operate SavvyHER is easy for me" and "It is easy for me to become skillful at using SavvyHER," with responses on a scale from "strongly disagree" (1) to "strongly agree" (5). Scores were calculated by averaging responses across PEOU items. PEOU scores ranged from 1 to 5, with higher scores indicating that users find the system intuitive. A high PEOU score suggests that users find the system intuitive.