Evidence map›Paper›PMID 28615967›Full record

ArticleJournal of pain research2017

Assessment of direct analgesic effect of duloxetine for chronic low back pain: post hoc path analysis of double-blind, placebo-controlled studies.

Hiroyuki Enomoto, Shinji Fujikoshi, Jumpei Funai, Nao Sasaki, Michael H Ossipov, Toshinaga Tsuji, Levent Alev, Takahiro Ushida

Open access · goldAbstract read
In one paragraph

Article in Journal of pain research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.3field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 15 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 2 countries.

Hiroyuki EnomotoMedical Science, Eli Lilly Japan K.K., Tokyo.
Shinji FujikoshiStatistical Science.
Jumpei FunaiScience Communications.
Nao SasakiMedical Science, Eli Lilly Japan K.K., Kobe, Japan.
Michael H OssipovClinical Division, inVentiv Health, LLC, Blue Bell, PA, USA.
Toshinaga TsujiMedical Affairs Department, Shionogi & Co., Ltd., Osaka, Japan.
Levent AlevMedical Department, Lilly Turkey, Istanbul, Turkey.
Takahiro UshidaMultidisciplinary Pain Center, Aichi Medical University, Nagakute, Aichi, Japan.
Eli Lilly (Japan) · JPAichi Medical University · JPShionogi (Japan) · JPStatistical Service · CY

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundComorbid depression and depressive symptoms are common in patients with chronic low back pain (CLBP). Duloxetine is clinically effective in major depressive disorder and several chronic pain states, including CLBP. The objective of this post hoc meta-analysis was to assess direct and indirect analgesic efficacy of duloxetine for patients with CLBP in previous clinical trials.

methodsPost hoc path analyses were conducted of 3 randomized, double-blind, clinical studies of patients receiving duloxetine or placebo for CLBP. The primary outcome measure for pain was the Brief Pain Inventory, average pain score. A secondary outcome measure, the Beck Depression Inventory-II, was used for depressive symptoms. The changes in score from baseline to endpoint were determined for each index. Path analyses were employed to calculate the proportion of analgesia that may be attributed to a direct effect of duloxetine on pain.

resultsA total of 851 patients (400 duloxetine and 451 placebo) were included in this analysis. Duloxetine significantly improved pain scores compared with placebo (

conclusionDuloxetine significantly improved pain in patients with CLBP. Path analyses results suggest that duloxetine produced analgesia mainly through mechanisms directly impacting pain modulation rather than lifting depressive symptoms. This effect was consistent across all subgroups tested.

Indexed as

chronic low back paindirect analgesic effectdouble-blindduloxetineplacebo-controlled studiespost hoc path analysis

Identifiers

PMID28615967
PMCPMC5460622
OpenAlexW2621006497

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.