a decreasing trendp = 0.13
Additionally, the ΔE1 parameter, reflecting color differences, revealed a decreasing trend in the cheek area for the GEN + group, with a statistically significant difference observed with PP analysis (ITT: MD = –0.39, 95% CI: –0.89 to 0.12, p = 0.13; PP: MD = –0.56, 95% CI: –1.06 to –0.06, p = 0.03), suggesting improved color consistency (Figure 2 ).