Table 9 Odds ratios and chi-square analyses for the most contributing group ‘senior contributor’ versus the other groups in terms of emotion expressions from the total posts.

From: Leveraging stylometry analysis to identify unique characteristics of peer support user groups in online mental health forums

Emotion concept

Compared user group

Odds ratio

95% CI

Chi-square

p value

Fear

Community guide

1.32

1.30–1.34

1164.92

< 0.0001

Community elder

1.01

0.99–1.03

0.41

0.5233

Casual contributor

0.70

0.69–0.71

1529.97

< 0.0001

Contributor

0.79

0.77–0.80

501.11

< 0.0001

Anger

Community guide

1.34

1.31–1.37

872.41

< 0.0001

Community elder

1.04

1.01–1.07

9.27

0.0023

Casual contributor

0.71

0.69–0.72

1004.77

< 0.0001

Contributor

0.83

0.80–0.85

213.24

< 0.0001

Sadness

Community guide

1.37

1.35–1.39

1526.92

< 0.0001

Community elder

1.06

1.04–1.09

30.1

< 0.0001

Casual contributor

0.75

0.73–0.76

1061.03

< 0.0001

Contributor

0.88

0.86–0.90

140.76

< 0.0001

Disgust

Community guide

1.41

1.38–1.45

805.39

< 0.0001

Community elder

1.06

1.03–1.10

12.7

0.0004

Casual contributor

0.81

0.79–0.83

243.46

< 0.0001

Contributor

0.87

0.85–0.90

71.45

< 0.0001

Anticipation

Community guide

1.06

1.05–1.07

91.52

< 0.0001

Community elder

1.01

0.99–1.02

0.56

0.4544

Casual contributor

1.13

1.11–1.15

196.43

< 0.0001

Contributor

1.09

1.06–1.11

69.25

< 0.0001

Trust

Community guide

1.02

1.01–1.04

16.53

< 0.0001

Community elder

0.97

0.95–0.99

12.83

0.0003

Casual contributor

1.06

1.05–1.08

52.78

< 0.0001

Contributor

1.01

0.99–1.03

0.95

0.3309

Surprise

Community guide

1.02

1.00–1.03

3.17

0.075

Community elder

1.03

1.00–1.05

4.13

0.0422

Casual contributor

1.34

1.31–1.38

478.37

< 0.0001

Contributor

1.24

1.20–1.27

206.25

< 0.0001

Joy

Community guide

0.98

0.97–0.99

9.15

0.0025

Community elder

0.97

0.95–0.99

8.96

0.0028

Casual contributor

1.28

1.25–1.30

614.63

< 0.0001

Contributor

1.17

1.14–1.19

202.9

< 0.0001