<![CDATA[Seborrheic dermatitis is a chronic inflammatory skin disorder. Age and sex are considered important factors influencing lesion distribution; however, studies evaluating their association with lesion predilection remain limited. This study aimed to analyze the association between age, sex, and lesion predilection of seborrheic dermatitis. This analytic observational study used a cross-sectional design based on medical records of seborrheic dermatitis patients from 2018 to 2025. A total of 300 subjects were included using total sampling. Independent variables included age and sex, while lesion predilection was categorized into scalp and non-scalp involvement. Data were analyzed using the Chi-square test and odds ratio analysis. Most subjects were male (57.7%) and adults (49.7%), with scalp lesions as the predominant presentation (60.3%). Significant associations were identified between sex and lesion predilection (p=0.011), as well as between age and lesion predilection (p<0.001). Adult and elderly patients demonstrated higher scalp lesion predilection compared to younger age groups (OR 2.75; 95% CI 1.68–4.52), while male patients had greater odds of scalp involvement than females (OR 1.83; 95% CI 1.15–2.93). Age and sex are significantly associated with lesion predilection in seborrheic dermatitis.]]>
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