Transmitted infections (STIs) and unintended pregnancies. This study examined sociodemographic, geographic, and behavioral factors, including mobile phone ownership, associated with risky sexual behavior among Indonesian women. A cross-sectional analysis was conducted using data from 30,875 women aged 15–49 years who participated in the 2017 Indonesian Demographic and Health Survey (IDHS). Survey-adjusted multivariable logistic regression was used to identify independent correlates. Compared with women aged 15–20 years, those aged 36–40 years (AOR = 1.47, 95% CI: 1.24–1.78) and ?41 years (AOR = 1.36, 95% CI: 1.16–1.59) had higher odds of risky sexual behavior. Higher educational attainment was also associated with increased odds, including primary education (AOR = 2.11, 95% CI: 1.06–4.22), secondary education (AOR = 2.70, 95% CI: 1.35–5.42), and higher education (AOR = 2.59, 95% CI: 1.28–5.25). Women living in the middle (AOR = 1.72, 95% CI: 1.41–2.10) and western regions (AOR = 1.49, 95% CI: 1.24–1.79), those reporting consistent condom use (AOR = 3.31, 95% CI: 2.93–3.72), those with knowledge of HIV testing (AOR = 1.30, 95% CI: 1.15–1.46), and those owning a mobile phone (AOR = 1.20, 95% CI: 1.04–1.40) were also more likely to report risky sexual behavior. These findings support age-specific, regionally tailored, and digitally supported sexual health interventions to reduce STI risk among Indonesian women.
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