Mode
Text Size
Log in / Sign up

Short course regimens 3HP, 4HR, and 4R show higher adherence and lower active cases than 9HShort Treatment Courses May Reduce Tuberculosis Cases in Children

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway
Consider short-course regimens like 4HR or 3HP for improved adherence and reduced active cases in pediatric TB.

This network meta-analysis evaluates the efficacy and adherence of various short-course regimens, including 4HR (isoniazid and rifampicin for 4 months), 3HP (isoniazid and rifapentine for 3 months), and 4R (rifampicin for 4 months), compared to the standard 9H (isoniazid for 9 months) in children and adolescents with TB infection.

The analysis found that 4HR significantly reduces the number of active TB cases compared with 9H (RR 0.49; 95% CI 0.32 to 0.76). Regarding treatment adherence, 3HP (RR 1.09; 95% CI 1.03 to 1.15), 4HR (RR 1.07; 95% CI 1.01 to 1.14), and 4R (RR 1.12; 95% CI 1.05 to 1.20) all showed higher adherence rates compared to 9H.

Safety data indicated that adverse reactions were more likely with 3HP compared to 4HR (OR 4.56) and 4R (OR 6.37), while 4R had fewer adverse reactions compared to 9H (OR 0.34). The authors noted high variability in the reporting of adverse reactions as a limitation. These findings suggest that short-course regimens may improve adherence and reduce active TB incidence, though clinical application should consider the reported variability in safety data.

How this fits prior evidence

This network meta-analysis addresses a gap in comparing specific short-course regimens for pediatric TB infection. It builds upon the understanding that TB may be common in malnourished children (prevalence 16%) and that biopsychosocial factors correlate with poor outcomes. While the current study focuses on treatment duration and adherence, it complements existing knowledge on the prevalence and social determinants of TB in pediatric populations.

This review looked at different ways to treat children and adolescents with drug-susceptible tuberculosis. Researchers compared several short-term treatments against a standard nine-month course of isoniazid. The short-term options included a four-month course of isoniazid and rifampicin, a three-month course of isoniazid and rifapentine, and a four-month course of rifampicin alone.

The results showed that the four-month isoniazid and rifampicin regimen significantly reduced the number of active tuberculosis cases compared to the nine-month standard. Additionally, all three shorter treatment options showed higher rates of patient adherence compared to the longer nine-month course. This means children were more likely to complete their medication on these shorter schedules.

Safety data showed some differences in how well patients tolerated the drugs. Specifically, the three-month isoniazid and rifapentine course was more likely to cause adverse reactions than the other short-term options. While shorter courses may improve completion rates, the high variability in how side effects were reported makes it hard to draw firm conclusions on safety. Patients and doctors should discuss these options based on individual needs.

What this means for you:
Shorter tuberculosis treatment plans may improve completion rates and reduce cases in children.

Common questions

How do shorter treatment plans compare to standard care?

The study found that a four-month course of isoniazid and rifampicin reduced the number of active tuberculosis cases compared to a nine-month course of isoniazid. Additionally, all three shorter regimens (3HP, 4HR, and 4R) showed higher treatment adherence rates than the nine-month standard.

Are there any side effects with these shorter treatments?

The study noted that the three-month isoniazid and rifapentine (3HP) course was more likely to cause adverse reactions compared to the other short-term options. However, the four-month rifampicin (4R) course had fewer adverse reactions than the nine-month standard.

Who is this finding relevant for?

This information specifically concerns children and adolescents under 18 years old who have a tuberculosis infection and are not living with HIV. These findings may help doctors decide on the best treatment duration for young patients.

Study Details

Study typeSystematic review
EvidenceLevel 1
Follow-up216.0 mo
PublishedSep 2026
View Original Abstract ↓
BACKGROUND: Although children are at a higher risk of progressing to tuberculosis (TB) disease compared with adults, research and publications addressing TB management have mostly emphasised adult disease. METHODS: MEDLINE, Embase, CENTRAL and grey literature were searched from inception to 3 May 2021, and updated on 12 December 2024 for the systematic review and network meta-analysis (NMA). Randomised controlled trials of children and/or adolescents under 18 years with TB infection, contacts of drug-susceptible TB, without HIV, evaluating the effectiveness and safety of available regimens for the treatment of TB were included. Meta-analysis was conducted using a random effects model. Risk of bias was assessed using the Cochrane RoB tool 2. Effect estimates (RR and OR) are presented with 95% CIs. Certainty of evidence was evaluated using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach. RESULTS: Eleven studies were obtained. All network geometries had open and disconnected loops, except adverse reactions for which we conducted a full NMA. We found that 4 months of isoniazid and rifampicin (4HR) reduces the number of active TB cases at 1 year, 2 years and 5 years of follow-up (RR 0.49 (95% CI 0.32 to 0.76)) compared with isoniazid for 9 months (9H). The isoniazid + rifapentine for 3 months (3HP) regimen (RR 1.09 (95% CI 1.03 to 1.15)), 4HR (RR 1.07 (95% CI 1.01 to 1.14)) and rifampicin for 4 months (4R) (RR 1.12 (95% CI 1.05 to 1.20)) regimens have higher treatment adherence compared with 9H. High variability was found in the reporting of adverse reactions, which were more likely to occur with 3HP compared with 4HR (OR 4.56 (95% CI 1.22 to 16.96)) and 4R (OR 6.37 (95% CI 2.11 to 19.19)). Adverse reactions occur less frequently with 4R (OR 0.34 (95% CI 0.20 to 0.58)) compared with 9H. CONCLUSIONS: This study synthesised available data on paediatric short and long-course regimens. Short course regimens may have higher adherence (3HP, 4HR, 4R) and may reduce active TB incidence (isoniazid + rifampicin for 3 months (3HR) and 4HR) compared with 9H. PROSPERO REGISTRATION NUMBER: CRD42021271512.
Free Newsletter

Clinical research that matters. Delivered to your inbox.

Join thousands of clinicians and researchers. No spam, unsubscribe anytime.