Table 1. Details on studies included in the systematic review.

Publication year	Author	Country	N	Gender	Mean MASI score	Assessment scale	Mean Scale Score	Whether the MASI and MELASQoL scores were related
2006	Dominguez et al. [22]	Spain	99	F	10.89	MELASQoL-S	42.49	YES (ρ = 0.233, p < 0.05)
2006	Cestari et al. [12]	Brazil	300	292 F, 8 M	/	MELASQoL-BP	44.40 ± 14.90	/
2008	Freitag et al. [26]	Brazil	83	F	10.60 ± 6.64	MELASQoL-P	37.50 ± 15.20	NO (ρ = 0.17, p = 0.109)
2009	Dogramaci et al. [14]	Turkey	114	F	/	MELASQoL-Tr	29.90 ± 14.60	YES (ρ = 0.35, p < 0.001)
2010	Misery et al. [27]	French	28	F	/	MELASQoL-F	20.90 (15.90–25.90)	NO
2013	Park et al. [23]	Korea	77	F	/	MELASQoL	38.10 ± 16.60	YES (p < 0.05)
2015	Yalamanchili et al. [30]	India	140	95 F, 45 M	/	MELASQoL	The study did not provide the average value, but it did give specific scores.	/
2015	Ikino et al. [28]	Brazil	51	F	/	MELASQoL-BP	34.40 ± 13.50	NO
2016	Harumi et al. [19]	Singapore	49	F	12.10 ± 6.50	MELASQoL	25.60 ± 15.30	NO
2016	Sarkar et al. [24]	India	100	F	20.00 ± 7.50	MELASQoL-Hi	37.19 ± 18.15	YES (ρ = 0.809, p < 0.05)
2018	Kothari et al. [29]	India	141	105 F, 36 M	9.07 ± 6.12	MELASQoL-Hi	28.61 ± 12.92	NO (ρ = 0.151, p = 0.074)
2019	Anderson et al. [20]	Australia	31	29 F, 2 M	4.70 ± 3.10	MELASQoL	55.00 ± 10.60	NO (ρ = 0.033, p = 0.09)
2018	Pollo et al. [25]	Brazil	155	134 F, 21 M	8.00 (5.00–14.00)	MELASQoL-BP	30.00 (17.00–45.00)	YES (ρ = 0.35, p < 0.05)
2019	Jusuf et al. [2]	Indonesia	30	/	13.07 ± 4.99	MELASQoL	39.97 ±12.07	NO (p = 0.797)