Table 1

Study data (n = 72).

Effect
Ways of delivery and duration of encounter in minutes (n = 70)aYesNo
 Individual interview, 10–2074
 Individual interview, 30–45125
 Individual interview, 60266
 Individual interview, 60–12042
 Group interviewb30
 Telephone interviewb01
Number of encounters (n = 71)cYesNo
 11015
 2120
 351
 482
 530
 >5132
Counsellor profession (n = 76)dYesNo
 Psychologist339
 Doctor194
 Other health care provider (nurse, midwife, dietician)56
Intervention period in months (n = 71)eYesNo
 <3411
 3–583
 6–11103
 12163
 12–2453
 >2450
Measuring method (n = 116)fYesNo
 Direct biological/clinical measures (e.g. HbA1c)258
 Direct utilisation of healthcare services (e.g. number of encounters)83
 Indirect measures (e.g. questionnaire)5319
Area of intervention (n = 72)YesNo
 Diabetes/asthma21
 Smoking cessation84
 Weight-loss/physical activity82
 Alcohol abuse235
 Psychiatrics/addiction127
  • a Two studies only described the intervention as an individual interview without describing an accurate length of the interview.

  • b The length of the group and telephone interviews was not described in the articles.

  • c One study only described the intervention as an individual interview without describing the number of counselling encounters.

  • d Five studies involved encounters with several counsellors of different educational background, which is why the total number exceeds the total number of studies.

  • e Study did not describe the follow-up period.

  • f In some studies both direct and indirect measures were used, which is why the total number exceeds the total number of studies.