Cognitive-behavioral therapy for the management of irritable bowel syndrome

Table 1 Randomized controlled trials reviewed by Khan et al[17]

Ref.	Country	Sample size	Psychological therapy used
Lackner et al[35]	United States	75	CBT
Lackner et al[42]	United States	71	CBT
Reme et al[43]	United States	149	CBT

CBT: Cognitive-behavioral therapy.

Table 2 Randomized controlled trials reviewed by Ford et al[2] (not including the trials described in Table 1)

Ref.	Country	Sample size	Psychological therapy used
Greene et al[45]	United States	20	CBT
Payne et al[46]	United States	22	CBT
Vollmer et al[48]	United States	34	CBT
Boyce et al[50]	Australia	105	CBT
Drossman et al[44]	United States	169	CBT
Tkachuk et al[47]	Canada	28	CBT
Kennedy et al[49]	England	149	CBT

CBT: Cognitive-behavioral therapy.

Table 3 Randomized controlled trials reviewed by Palsson et al[51] (not including the trials described in Tables 1 and 2)

Ref.	Country	Sample size	Psychological therapy used
Lynch et al[52]	Canada	21	CBT
Heymann-Monnikes et al[53]	Germany	20	CBT
Sanders et al[54]	United States	28	CBT
Hunt et al[55]	United States	54	CBT
Moss-Morris et al[56]	England	64	CBT
Craske et al[40]	United States	110	CBT
Ljotsson et al[57]	Sweden	195	CBT
Ljotsson et al[58]	Sweden	61	CBT
Oerlemans et al[59]	The Netherlands	75	CBT

CBT: Cognitive-behavioral therapy.