Efficacy Group A Group B Group C Total Sample rs p rs p rs p rs p Age -0.016 0.946 -0.215 0.363 -0.275 0.240 -0.134 0.306 Duration -0.345 0.137 -0.238 0.313 -0.498* 0.025 -0.307* 0.017 Fitzpatrick skin type -0.212 0.371 -0.093 0.697 -0.598* 0.005 -0.327* 0.011

Table 5: Correlation between efficacy of treatment with age of patients, duration of melasma and Fitzpatrick skin type in studied groups of patients.