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Table 2 Between and within group comparison for illness perception

From: Effect of Leventhal’s self-regulatory intervention on the hypertensive patients’ illness perception and lifestyle: a randomized controlled trial

Subscale

Group time

Intervention

Control

Between group comparison

Mean ± SD (95% CI)

Mean ± SD (95% CI)

p-value

Identity

Before

3.5 ± 1.6 (3.1–4.1)

3.9 ± 1.8 (3.4–4.5)

0.3

Post

2.8 ± 1.5 (2.3–3.2)

3.9 ± 1.9 (3.3–4.5)

0.006

Within group comparison

Effect size

0.4

0.002

 

p-value

0.001

0.7

 

Timeline (acute/chronic)

Before

19.1 ± 4.3 (17.7–22.4)

19.9 ± 3.3 (18.9–20.9)

0.3

Post

21.7 ± 3.4 (20.5–22.7)

19.8 ± 2.9 (19–20.7)

0.009

Within group comparison

Effect size

0.5

0.002

 

p-value

0.001

0.8

 

Consequences

Before

19.4 ± 5.6 (17.7–21.2)

18.1 ± 6.2 (16.1–19.9)

0.3

Post

18.5 ± 4.9( 16.8–20.2)

18.1 ± 5.5(16.3–19.8)

0.7

Within group comparison

Effect size

0.1

0.001

 

p-value

0.001

0.9

 

Personal control

Before

21.2 ± 4.2( 19.8–22.6)

20.5 ± 3.3 (19.5–21.5)

0.3

Post

22.7 ± 3.1( 21.7–23.7)

20.9 ± 3.5 (19.9–22)

0.01

Within group comparison

Effect size

0.2

0.07

 

p-value

0.001

0.08

 

Treatment control

Before

20.2 ± 2 (19.5–20.8)

19.9 ± 1.8 (19.4–20.5)

0.4

Post

21.5 ± 2 (20.9–22.1)

20.1 ± 2 (19.5–20.8)

0.003

Within group comparison

Effect size

0.4

0.03

 

p-value

0.001

0.3

 

Illness coherence

Before

15.6 ± 3.1 (14.7–16.6)

15.8 ± 3.6 (14.7–16.9)

0.7

Post

17.9 ± 2.8 (17.1–18.9)

16.1 ± 3.6( 15.1–17.2)

0.01

Within group comparison

Effect size

0.5

0.03

 

p-value

0.001

0.3

 

Timeline cyclical

Before

13.8 ± 2.7 (13–14.7)

13.19 ± 3.1( 12.2–14.1)

0.2

Post

11.5 ± 2.3 (10.8–12.2)

13 ± 2.7 (12.1–13.8)

0.01

Within group comparison

Effect size

0.5

0.01

 

p-value

0.001

0.5

 

Emotional representations

Before

22.9 ± 5.5 (21.3–24.5)

20.7 ± 6.2 (19–22.7)

0.1

Post

22 ± 4.5 (20.6–23.2)

20.9 ± 5.5 (19.3–22.6)

0.3

Within group comparison

Effect size

0.08

0.01

 

p-value

0.05

0.7

 
  1. Between group comparison based on t-test
  2. Within group comparison based on paired t-test