* Country/Culture: Dating norms and social expectations differ significantly across cultures.
* Age within high school: Relationships are more common among older high school students.
* Definition of "relationship": What constitutes a "relationship" is subjective. It can range from casual dating to serious, committed partnerships.
* Data Collection Method: Reliable, comprehensive data on this topic is difficult to obtain. Self-reported surveys can be biased.
While various studies exist, they offer estimates rather than precise figures, and these estimates vary considerably. It's safe to say a significant portion of high school students experience romantic relationships, but the exact percentage remains unknown and fluctuates based on the factors above.