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Table 3 Effect size estimates by group (Yoga vs. CBT) and follow-up time period for primary outcome measures

From: Yoga is effective for treating chronic pain in veterans with Gulf War Illness at long-term follow-up

Treatment

Follow-up

Pain Severity

Mean

Pain Severity

Cohen’s d

Pain Interference

Mean

Pain Interference

Cohen’s d

Pain Total

Mean

Pain Total

Cohen’s d

Yoga

EOT

4.67 ±2.44

(n = 32)

0.26

3.65 ±2.17

(n = 31)

0.50

4.00 ±2.08

(n = 31)

0.47

 

2m FU

5.19 ±1.89

(n = 24)

0.04

4.65 ±2.47

(n = 23)

0.36

4.84 ±2.19

(n = 23)

0.25

 

4m FU

4.70 ±2.34

(n = 23)

0.27

4.37 ±2.44

(n = 23)

-0.00

4.47 ±2.24

(n = 23)

0.06

 

6m FU

4.91 ±1.93

(n = 29)

0.18

4.60 ±2.49

(n = 27)

-0.20

4.70 ±2.17

(n = 27)

-0.11

CBT

EOT

5.20 ±2.60

(n = 19)

0.26

4.65 ±2.60

(n = 16)

0.50

4.95 ±2.35

(n = 16)

0.47

 

2m FU

5.27 ±2.43

(n = 15)

0.04

5.36 ±3.15

(n = 15)

0.36

5.33 ±2.87

(n = 15)

0.25

 

4m FU

5.23 ±2.55

(n = 15)

0.27

4.37 ±2.78

(n = 14)

-0.00

4.59 ±2.68

(n = 14)

0.06

 

6m FU

5.26 ±2.67

(n = 18)

0.18

4.20 ±2.71

(n = 17)

-0.20

4.48 ±2.64

(n = 17)

-0.11

  1. Note: EOT End-of-Treatment; m month; FU Follow-up time point; Cohen’s d estimated as the difference in treatment means at each follow-up time point divided by square root of the sum of variances of random effects