Psychometric Test Of Chinese Quality Of Life With Implant Prostheses

The demand for dental implants is increasing in China; however, there is currently no validated assessment tool tailored to the oral health-related quality of life among this population. This study aimed to translate the Quality of Life with Implant Prostheses scale (QoLIP-10) into Chinese and evaluate its psychometric properties, including validity and reliability. The QoLIP-10 was translated into Chinese using the Brislin translation model. A total of 202 implant-prosthesis wearers were recruited between December 2022 and March 2023 in China. Psychometric evaluation included exploratory factor analysis (EFA), confirmatory factor analysis (CFA), criterion validity, content validity, internal consistency (Cronbach’s α), split-half reliability, and test-retest reliability. The Chinese version of QoLIP-10 was successfully adapted to align with China’s cultural context. EFA extracted two factors, explaining 68.04% of the cumulative variance. CFA demonstrated good model fit (χ²/df = 1.600, RMSEA = 0.077, CFI = 0.981, IFI = 0.982, TLI = 0.972). Criterion validity yielded a correlation coefficient of 0.386. Content validity indices were strong, with item-level (I-CVI) and scale-level (S-CVI) values ranging from 0.80–1.00 and 0.96, respectively. Internal consistency was excellent (total Cronbach’s α = 0.871; subscales: 0.896 and 0.910). Split-half reliability was 0.716, and test-retest reliability (2-week interval) was 0.875. The Chinese QoLIP-10 exhibits robust reliability and validity, making it a suitable tool for assessing quality of life in implant-prosthesis wearers in China.