Efficacy of a new head lice treatment based on silicon oil
| ISRCTN | ISRCTN15117709 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN15117709 |
| Protocol serial number | CAAE - 1422.0.000.040-06 179/06 |
| Sponsor | Mandacaru Foundation (Brazil) |
| Funder | Mandacaru Foundation (Brazil) |
- Submission date
- 02/05/2008
- Registration date
- 12/05/2008
- Last edited
- 16/10/2008
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Infections and Infestations
Plain English summary of protocol
Not provided at time of registration
Contact information
Scientific
Departamento de Saúde Comunitária
Faculdade Medicina
Rua Prof. Costa Mendes 1608, 5. andar
Fortaleza
60430-140
Brazil
Study information
| Primary study design | Interventional |
|---|---|
| Study design | Randomised, controlled, observer-blinded clinical trial |
| Secondary study design | Randomised controlled trial |
| Scientific title | Efficacy of a pediculicide based on dimeticone: randomised observer-blinded comparative trial in patients with severe infestation |
| Study acronym | DIMPED (DIMeticone for the treatment of PEDiculosis) |
| Study objectives | The efficacy against head lice infestation of a product containing a high (92%) concentration of the silicon oil dimeticone (similar to Nyda®) is similar or superior to a product containing 1% permethrin. |
| Ethics approval(s) | Ethics approval received from the Ethical Review Board of the Federal University of Ceará (Brazil) on the 14th September 2006 (ref: 179/06). Registered in the database of the Brazilian Ministry of Health for studies involving human subjects (Sistema Nacional de Informações Sobre Ética em Pesquisa envolvendo Seres Humanos [SISNEP]), accessible under http://portal.saude.gov.br/sisnep/pesquisador/ (project no: 1422.0.000.040-06). |
| Health condition(s) or problem(s) studied | Active head lice infestation |
| Intervention | Participants were recruited from a poor urban neighbourhood in Brazil where head lice are highly prevalent. To minimise reinfestation during the trial, study participants were transferred to a holiday resort outside the endemic area for a period of nine days. Participants were randomised to receive either topical treatment with a product containing a high percentage of dimeticones (92%), equivalent in composition to Nyda® (G. Pohl-Boskamp GmbH & Co. KG, Hohenlockstedt, Germany), or topical permethrin 1% aqueous solution (Kwell®, GlaxoSmithKline, Brazil). Two topical applications were done, seven days apart. Participants were treated immediately upon arrival at the resort (day 1) and, a second time seven days later (day 8) to kill newly hatched lice from eggs which may have survived the first treatment. The products were used according to the producers' recommendations. The fine tooth comb provided by both producers together with the pediculicide was not used after the topical application of the products. The dimeticone-based product was applied to dry hair and then left to dry naturally. After eight hours the hair was washed with a commercial shampoo not containing dimeticones. Kwell® was applied to wet hair, left for 30 minutes and thereafter washed out in an identical manner as the other product. Both products were applied systematically onto the hair from the hair shafts to the tips, and a normal comb was used to spread the liquids evenly. The dimeticon-based product (in composition similar to Nyda® , G. Pohl-Boskamp GmbH & Co. KG, Hohenlockstedt, Germany) was prepared at the Department of Pharmacy of the Federal University of Ceará by an experienced pharmacist, the permethrin product bought locally at a pharmacy. |
| Intervention type | Drug |
| Phase | Not Specified |
| Drug / device / biological / vaccine name(s) | Dimeticone product equivalent in composition to Nyda®, topical permethrin |
| Primary outcome measure(s) |
The primary outcome measure was defined as the proportion of participants cured of head lice infestation one, six and eight days after the first treatment (i.e. days 2, 7 and 9, respectively). Cure was defined as the complete absence of viable lice on the scalp, as determined by wet combing with a high quality plastic head louse comb. |
| Key secondary outcome measure(s) |
1. Reduction of clinical pathology: days 1 (before intervention), 2, 4, 7 and 9 |
| Completion date | 31/01/2007 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | Child |
| Lower age limit | 5 Years |
| Upper age limit | 15 Years |
| Sex | All |
| Target sample size at registration | 146 |
| Key inclusion criteria | 1. Children aged 5 - 15 years, either sex 2. An active head lice infestation (one or more active head lice found after three minutes of visual inspection) 3. Written consent obtained from study participants and carers |
| Key exclusion criteria | 1. Use of head lice products, anthelminthics, or antibiotics within the previous four weeks 2. Severe skin disorders of the scalp (such as generalised impetigo, eczema, psoriasis or chronic dermatitis of unknown origin) 3. Bleached or colour treated hair within the previous four weeks 4. Known sensitivity to any ingredients in the products 5. Mental disease 6. Drug abuse 7. Pregnant or lactating girls 8. Unwillingness to stay for nine days in a holiday resort outside the endemic area where the clinical trial would be carried out 9. Participation in another clinical study in the previous month |
| Date of first enrolment | 02/01/2007 |
| Date of final enrolment | 31/01/2007 |
Locations
Countries of recruitment
- Brazil
Study participating centre
60430-140
Brazil
Results and Publications
| Individual participant data (IPD) Intention to share | No |
|---|---|
| IPD sharing plan summary | Not provided at time of registration |
| IPD sharing plan |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Results article | Results: | 10/09/2008 | Yes | No |
