KOMCHE 
Amhara: Tends to have the lowest median age and highest rates of early sexual debut, closely linked with early marriage. The median often sits between 15.0 and 16.0 years
Oromia: Often registers near the national average or slightly higher, at ~16.6 to 17.0 years, though some rural zones show much earlier initiation rates.
Tigray: Median age typically falls between 16.0 and 16.5 years, heavily impacted by low educational attainment and rural residence.
Old SNNP (Southern Nations, Nationalities, and Peoples') Region: Historically shows a slightly older median age, often hovering closer to 17.0 years. However, this old region was incredibly diverse; rural enclaves initiated sex much earlier, while urban areas like Hawassa trended higher.
Somali & Afar: Median ages are slightly older (often 17.5 to 18.0+ years for women), heavily driven by different socio-cultural and pastoralist traditions compared to the highlands.
Gambela & Benishangul-Gumuz: Generally align with the lower national averages or slightly younger.
Addis Ababa (City Administration): Has the highest median age at first sex, usually above 20.0 years, due to higher educational enrollment, urban lifestyles, and delayed marriages