Table 2.

Summary of Study Intervention Characteristics (N = 4,199 participants)

Characteristic	Intervention Group (%)	Control Group (%)
Sample size
Studies	63.51	54.89
Participants	50.05	46.97
No. of treatment sessions
Mean	6.48
Standard deviation	11.76
No. of treatment or control arms
One	74	90
Two	26	10
Three	2
Type of intervention
Skills training	48
Education	50
Supportive-expressive therapy	2
Focus of the intervention
Individual	90
Group/dyads/families	10
Intervention format
In-person	76
Audiovisual	22
Print	20
Telephone	12
Web	5
Intervention providers
Nurses	63
Other (radiation oncologist, health educator)	15
Psychologists	10
Social workers	2
Multidisciplinary teams	7
Types of control groups
Usual care	64
Component control*	31
Equivalent active treatment (cross-over design)	5
Wait list control	2
Primary delivery setting
Home†	27
Clinic	73

NOTE. Data coded by the study or the raters as unknown are not included.

^*Component controls exclude the active ingredients of treatment but generally including nonspecific therapeutic factors such as expectations of improvement (eg, therapist-led intervention group without supportive-expressive therapy v therapist-led intervention group with supportive-expressive therapy).⁵⁷

^†Includes delivery in the home and in the clinic.