Learning from past mistakes : assessing trial quality, power and eligibility in non-renal systemic lupus erythematosus randomized controlled trials
OBJECTIVES: To evaluate the post hoc study power of randomized controlled trials (RCTs) in the treatment of non-renal SLE and to determine the generalizability of these RCTs using an SLE database.
METHODS: RCTs in non-renal SLE were identified using PubMed (1975-2007). Inclusion/exclusion criteria, trial quality (5-point scale) and results of each study were recorded. The inclusion/exclusion criteria were compared with an SLE database to determine the proportion of patients from the database who would theoretically be eligible for these trials. For each negative study, we calculated the post hoc study power. We also looked for temporal improvements of trials in the literature and examined if pharmaceutical involvement influenced trial quality.
RESULTS: Sixty-four articles were included; the mean power of 30 negative studies was 24.6 +/- s.e.m. 3.9% (range 2.5-81.1%). Only one study had a power > 80%. Overall, potential eligibility of SLE patients in the database was 45.1 +/- s.e.m. 3.6%. Only 14 studies (21.9%) were of good quality. Fortunately, RCT quality is improving over time (trials <1995, compared with 1996-2002 and >2003; P < 0.001). Trials with pharmaceutical involvement had a significantly higher number of enrollees and better study quality.
CONCLUSIONS: Negative RCTs in SLE were mostly underpowered but the generalizability of these trials was high. Determination of study power and the impact of eligibility criteria on generalizability of study results are crucial in the design of clinical trials to ensure applicability to clinical practice.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2008 |
|---|---|
| Erschienen: |
2008 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:47 |
|---|---|
| Enthalten in: |
Rheumatology (Oxford, England) - 47(2008), 9 vom: 29. Sept., Seite 1367-72 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
|---|
| Links: |
|---|
| Themen: |
|---|
| Anmerkungen: |
Date Completed 14.10.2008 Date Revised 25.08.2008 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1093/rheumatology/ken230 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM180436619 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM180436619 | ||
| 003 | DE-627 | ||
| 005 | 20231223155459.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231223s2008 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/rheumatology/ken230 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n0602.xml |
| 035 | |a (DE-627)NLM180436619 | ||
| 035 | |a (NLM)18577549 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Yuen, S Y |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Learning from past mistakes |b assessing trial quality, power and eligibility in non-renal systemic lupus erythematosus randomized controlled trials |
| 264 | 1 | |c 2008 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 14.10.2008 | ||
| 500 | |a Date Revised 25.08.2008 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a OBJECTIVES: To evaluate the post hoc study power of randomized controlled trials (RCTs) in the treatment of non-renal SLE and to determine the generalizability of these RCTs using an SLE database | ||
| 520 | |a METHODS: RCTs in non-renal SLE were identified using PubMed (1975-2007). Inclusion/exclusion criteria, trial quality (5-point scale) and results of each study were recorded. The inclusion/exclusion criteria were compared with an SLE database to determine the proportion of patients from the database who would theoretically be eligible for these trials. For each negative study, we calculated the post hoc study power. We also looked for temporal improvements of trials in the literature and examined if pharmaceutical involvement influenced trial quality | ||
| 520 | |a RESULTS: Sixty-four articles were included; the mean power of 30 negative studies was 24.6 +/- s.e.m. 3.9% (range 2.5-81.1%). Only one study had a power > 80%. Overall, potential eligibility of SLE patients in the database was 45.1 +/- s.e.m. 3.6%. Only 14 studies (21.9%) were of good quality. Fortunately, RCT quality is improving over time (trials <1995, compared with 1996-2002 and >2003; P < 0.001). Trials with pharmaceutical involvement had a significantly higher number of enrollees and better study quality | ||
| 520 | |a CONCLUSIONS: Negative RCTs in SLE were mostly underpowered but the generalizability of these trials was high. Determination of study power and the impact of eligibility criteria on generalizability of study results are crucial in the design of clinical trials to ensure applicability to clinical practice | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Review | |
| 700 | 1 | |a Pope, J E |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Rheumatology (Oxford, England) |d 1999 |g 47(2008), 9 vom: 29. Sept., Seite 1367-72 |w (DE-627)NLM102581908 |x 1462-0332 |7 nnns |
| 773 | 1 | 8 | |g volume:47 |g year:2008 |g number:9 |g day:29 |g month:09 |g pages:1367-72 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1093/rheumatology/ken230 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 47 |j 2008 |e 9 |b 29 |c 09 |h 1367-72 | ||