Data collection.

<div><p>e-Huffaz ProHealth is a lifestyle intervention module developed specifically for Tahfiz students. The e-Huffaz ProHealth consists of physical health, nutritional and psychological components. This study aimed to develop the knowledge, attitude and practice (KAP) questionnaires on e-Huffaz ProHealth among Tahfiz students. This cross-sectional pilot study was conducted in 2022. The first phase entailed developing the KAP questionnaires. The second phase involved determining the content validity and face validity. While the third phase involved evaluating the reliability. A total of six experts from public academic institutions participated in the initial evaluation stage to assess validity while five experts were involved in the second stage. Thirty-three and 41 respondents were involved for the face validity and reliability evaluation, respectively. The questionnaires were distributed via Google Docs and hard copies were handed out in person to Tahfiz school teachers and students at Madrasah Tahfiz Al-Amani and Pondok Moden Tahfiz Saadah Addaarain. The findings demonstrated that the Item Content Validity Index (I-CVI) for the three components of the KAP questionnaires at the second stage of evaluation was high (1.0). The scores for the Scale Face Validity Average Index (S-FVI/Average) in assessing the level of clarity and understanding for the three components were 0.89 and 0.88, 0.92 and 0.90, and 0.88 and 0.9, respectively. Meanwhile, the reliability of KAP for physical activity was moderate (0.43), very high (0.91) and high (0.7), respectively. For nutrition, the reliability of KAP was good and acceptable with the values of 0.63, 0.83 and 0.65, respectively. The results of reliability of KAP for psychological well-being was good with the values of 0.54, 0.56 and 0.84, respectively. The KAP questionnaires of e-Huffaz ProHealth was successfully developed with high content validity, good face validity and acceptable reliability. Hence, it can be used for future study to evaluate the effectiveness of e-Huffaz ProHealth among Tahfiz students.</p></div>