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Table 5 Moderators of change in autonomous motivation for exercise (B-coefficients and 95% CIs from linear regression models)

From: Psychosocial mediators of change in physical activity in the Welsh national exercise referral scheme: secondary analysis of a randomised controlled trial

Relative Autonomy Index (RAI) intervention effect in subgroups

 

Gender (subgroup 1 = female N = 680, 2 = male N = 364)

Reason for referral (1 = CHD N = 783 2 = Mental health N = 261)

Age (1 = 16-44 N = 246, 2 = 45-59 N = 362, 3 = 60+ N = 421)

Deprivation (1 = low N = 371 2 = medium N = 371 3 = high N = 272)

Baseline PA (1 = inactive N = 622 2 = moderately inactive N = 150 3 = active N = 263)

Subgroup 1

0.31

0.33

0.36

0.24

0.40

(0.17 to 0.46)

(0.20 to 0.46)

(0.12 to 0.59)

(0.05 to 0.43)

(0.26 to 0.54)

Subgroup 2

0.31

0.29

0.32

0.36

0.46

(0.11 to 0.50)

(0.06 to 0.52)

(0.12 to 0.51)

(0.16 to 0.55)

(0.15 to 0.76)

Subgroup 3

  

0.33

0.39

0.07

  

(0.15 to 0.51)

(0.17 to 0.62)

(-0.17 to 0.31)

Interaction effects (whole sample)

 

N = 1096

N = 1096

N = 1096

N = 1063

N = 1096

Trial effects

0.31

0.33

0.34

0.24

0.40

(-0.03 to 0.65)

(0.20 to 0.46)

(0.10 to 0.58)

(0.05 to 0.43)

(0.26 to 0.55)

Moderator

Subgroup 2vs1

0.04

0.05

0.25

-0.13

0.21

(-0.13 to 0.21)

(-0.14 to 0.24)

(0.04 to 0.47)

(-0.44 to 0.06)

(-0.03 to 0.45)

Subgroup 3vs1

  

0.57

0.01

0.57

  

(0.36 to 0.77)

(-0.19 to 0.22)

(0.38 to 0.77)

Interaction effects

Subgroup 2vs1

0.01

-0.03

-0.03

0.13

0.00

(-0.23 to 0.25)

(-0.29 to 0.23)

(-0.33 to 0.28)

(-0.14 to 0.41)

(-0.33to 0.33)

Subgroup 3vs1

  

-0.01

0.13

-0.31

  

(-0.30 to 0.29)

(-0.15 to 0.42)

(-0.58 to -0.05)

  1. Significant associations (p < 0.05) in bold.