DATASET FOR STUDY: Reliability of the Enhanced Paper Grip Test and Its Association with Static Balance in Primary School Children

The Enhanced Paper Grip Test (EPGT) is a simple method for assessing foot and ankle strength, but its measurement properties in children remain unknown. This study examined the reliability of the EPGT and its association with static balance in primary school children. Children aged 6–11 years (n = 100) performed the EPGT and the Stork Balance Stand Test. Testing was repeated by two raters to assess inter-rater reliability within a single session. Test–retest/intra-rater reliability was evaluated over a 14-day interval (n = 93). Relative reliability was quantified using the intraclass correlation coefficient (ICC), and absolute reliability using the typical error (TE) and coefficient of variation (CV). Associations with balance were analysed using Pearson and partial correlations. Differences by sex and grade were examined using two-way analysis of variance. Intra-rater reliability was good (ICC = 0.76–0.84), with inter-rater (ICC = 0.75–0.83) and test–retest reliability (ICC = 0.70–0.80) also acceptable. However, absolute reliability was poor (CV > 20%). When used to assess asymmetry between limbs, the EPGT showed low relative reliability (ICC = 0.22–0.48). EPGT force was moderately associated with balance (r = 0.40, p < 0.001), remaining significant after age adjustment (r = 0.31, p = 0.004). In conclusion, the EPGT is feasible and shows good relative reliability in children, but limited absolute precision and poor asymmetry reliability. Its association with balance supports potential functional relevance.