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Table 2 Characteristics of included reviews

From: Interventions to improve delivery of isoniazid preventive therapy: an overview of systematic reviews

Author, year, reference

Systematic review objective(s)

Study settings (no. of studies related to IPT delivery)

Participants

Countries where studies conducted

Percent studies in high TB incidence settinga

Outcome related to TCR

Applicability

Al-Darraji, 2012 [23]

Review interventions to improve IPT delivery in correctional facilities

Jails and prisons (18)

Adults

US, Spain, Singapore

6%

Median TCR 44% (3-87%); low TCRs among RCTs (23, 12 and 12%)

Behavior of incarcerated adults may not be generalizable; incomplete HIV prevalence data

DeFulio, 2012 [24]

Review use of incentives on medication adherence

Methadone, primary care, and public clinics, homeless shelters (5)

Adults and children

US, Timor-Leste

20%

TCR improved in 2 of 3 studies (44% v. 26% and 92% v. 82%); 1 showed no effect

Behavior of addicted and homeless populations may not be generalizable; only 1 study included children, none specified inclusion of HIV populations

Hirsch-Moverman, 2008 [26]

To identify predictors of adherence and adherence interventions

Jails, refugee camp, homeless shelter, healthcare setting (19)

IV drug users, incarcerated, homeless, refugee/ foreign-born, healthcare workers, aboriginal populations

US and Canada

0%

Inconsistent across studies; no single intervention reliably showed effectiveness

Mixed adult populations; lack of regional diversity; incomplete HIV prevalence data

Lewin, 2010 [9]

To assess the effects of lay health worker interventions in primary and community health care on maternal and child health and the management of infectious diseases

US (2)

IV drug users, adolescents (ages 11-19, mostly Hispanic American)

US

0%

Little to no effect on treatment completion (RR = 1 · 0)

No children under age 5 included, 20% HIV-infected in one study, HIV status unknown in other study

Uyei, 2011 [25]

To examine the effect of strategies for TB and HIV service integration on delivery, outcomes for patients, and cost-effectiveness

Counseling and testing centers, hospitals, clinics (6)

HIV-infected patients

Botswana, South Africa, Uganda

100%

High adherence (75-92%); moderate to high TCRs (47-88%)

Unclear if children included

Zuñiga, 2012 [27]

To synthesize data on LTBI treatment adherence in Hispanic populations in the US

Clinics and public health programs dispensing LTBI treatment (12)

Hispanic adults

US

0%

Self-reports of LTBI adherence may be inaccurate; power dynamic impedes patient and healthcare provider communication; direct measures of adherence will improve validity of results

No children included; adult Hispanic populations only, no HIV data

  1. aHigh TB incidence defined as TB incidence > 30/100,000.
  2. IPT = isoniazid preventive therapy; TB = tuberculosis; TCR = treatment completion rate; RCT = randomized controlled trial; IV = intravenous; LTBI = latent tuberculosis infection.