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. 2021 Aug 16;8(8):e28150. doi: 10.2196/28150

Table 2.

Study design and Mixed Methods Appraisal Tool (MMAT) quality score distribution.

MMAT score distribution References Studies, n (%)
Quantitative randomized controlled trials (n=17)


0 None 0 (0)

25 [36,102-105] 5 (29)

50 [106-108] 3 (18)

75 [109-113] 5 (29)

100 [85,86,114,115] 4 (24)
Quantitative nonrandomized studies (n=8)


0 [116] 1 (13)

25 None 0 (0)

50 [80] 1 (13)

75 [117-122] 6 (75)

100 None 0 (0)
Quantitative descriptive studies (n=3)


0 None 0 (0)

25 None 0 (0)

50 [123] 1 (33)

75 [124] 1 (33)

100 [82] 1 (33)