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Table 6 Correlation coefficients between rating systems available in app stores and MARS star rating, total and subjective quality scores, by number of ratings cut-off and rater

From: Development and validation of the Italian version of the Mobile Application Rating Scale and its generalisability to apps targeting primary prevention

MARS item/scale

N of apps (%)

N of ratings cut-off

Rater 1

Rater 2

Estimate

p

Estimate

p

MARS star rating (N23)a

37 (86.0)

1

.18

.28

.26

.12

31 (72.1)

5

.25

.17

.31

.086

23 (53.5)

10

.50

.015

.46

.028

MARS total scoreb

37 (86.0)

1

.02

.92

.09

.62

31 (72.1)

5

.03

.89

.09

.62

23 (53.5)

10

.43

.041

.37

.081

App subjective qualityb

37 (86.0)

1

.16

.35

.20

.23

31 (72.1)

5

.19

.30

.26

.16

23 (53.5)

10

.50

.015

.54

.008

  1. a Spearman’s ρ correlation coefficient; b Pearson’s r correlation coefficient