A Study to Evaluate the Efficacy and Safety of CG5503 Prolonged Release (PR) in Subjects With Moderate to Severe Chronic Pain Due to Osteoarthritis of the Knee

This study has been completed.

Study NCT00486811 Information provided by Grünenthal GmbH

First Received on June 14, 2007. Last Updated on January 13, 2011 History of Changes

Results First Received: October 25, 2010

Study Type:	Interventional
Study Design:	Allocation: Randomized; Endpoint Classification: Efficacy Study; Intervention Model: Parallel Assignment; Masking: Double Blind (Subject, Investigator); Primary Purpose: Treatment
Conditions:	Pain Knee Osteoarthritis
Interventions:	Drug: Tapentadol ER (100 to 250 mg twice daily) Drug: Matching Placebo (twice daily) Drug: Oxycodone CR (20 to 50 mg twice daily)

Participant Flow

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Recruitment Details

Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
First participant was enrolled on 04 June 2007 and the last participant out was on 18 July 2008. Numbers refer to participants taking at least one dose.

Pre-Assignment Details

Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
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Reporting Groups

	Description
Placebo Matching	Drug: Matching Placebo (twice daily) The starting dose of placebo was matched with the active treatment arms taken twice daily for the first 3 days. The dose was then increased to match the active treatments for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days as in the active treatment arms. Dose decreases were allowed without time restrictions.
Tapentadol ER	Tapentadol ER (100 to 250 mg twice daily) The starting dose was tapentadol ER 50 mg twice daily for 3 days. The dose was then increased to 100 mg tapentadol ER twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Tapentadol ER 50, 100, 150, 200 or 250 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).
Oxycodone CR	Oxycodone CR (20 to 50 mg twice daily). The starting dose was oxycodone CR 10 mg twice daily for 3 days. The dose was then increased to 20 mg oxycodone CR twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Oxycodone doses were thus 10, 20, 30, 40 or 50 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).

Description

Placebo Matching

Drug: Matching Placebo (twice daily)

The starting dose of placebo was matched with the active treatment arms taken twice daily for the first 3 days. The dose was then increased to match the active treatments for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days as in the active treatment arms. Dose decreases were allowed without time restrictions.

Tapentadol ER

Tapentadol ER (100 to 250 mg twice daily) The starting dose was tapentadol ER 50 mg twice daily for 3 days. The dose was then increased to 100 mg tapentadol ER twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions.

Tapentadol ER 50, 100, 150, 200 or 250 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).

Oxycodone CR

Oxycodone CR (20 to 50 mg twice daily).

The starting dose was oxycodone CR 10 mg twice daily for 3 days. The dose was then increased to 20 mg oxycodone CR twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Oxycodone doses were thus 10, 20, 30, 40 or 50 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).

Participant Flow: Overall Study

	Placebo Matching	Tapentadol ER	Oxycodone CR
STARTED	337	319	331
COMPLETED	215	179	119
NOT COMPLETED	122	140	212
Adverse Event	28	60	135
Lack of Efficacy	34	14	7
Lost to Follow-up	4	6	4
Withdrawal by Subject	33	44	58
Study drug non-compliant	5	6	3
All other	18	10	5

Baseline Characteristics

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Reporting Groups

	Description
Placebo Matching	Drug: Matching Placebo (twice daily) The starting dose of placebo was matched with the active treatment arms taken twice daily for the first 3 days. The dose was then increased to match the active treatments for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days as in the active treatment arms. Dose decreases were allowed without time restrictions.
Tapentadol ER	Tapentadol ER (100 to 250 mg twice daily) The starting dose was tapentadol ER 50 mg twice daily for 3 days. The dose was then increased to 100 mg tapentadol ER twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Tapentadol ER 50, 100, 150, 200 or 250 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).
Oxycodone CR	Oxycodone CR (20 to 50 mg twice daily). The starting dose was oxycodone CR 10 mg twice daily for 3 days. The dose was then increased to 20 mg oxycodone CR twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Oxycodone doses were thus 10, 20, 30, 40 or 50 mg twice a day (BID) were dosed by participants during 15 weeks (3 weeks titration and 12 weeks maintenance).

Description

Placebo Matching

Drug: Matching Placebo (twice daily)

Tapentadol ER

Tapentadol ER (100 to 250 mg twice daily)

The starting dose was tapentadol ER 50 mg twice daily for 3 days. The dose was then increased to 100 mg tapentadol ER twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions.

Tapentadol ER 50, 100, 150, 200 or 250 mg twice a day (BID) during 15 weeks were dosed by participants (3 weeks titration and 12 weeks maintenance).

Oxycodone CR

Oxycodone CR (20 to 50 mg twice daily).

The starting dose was oxycodone CR 10 mg twice daily for 3 days. The dose was then increased to 20 mg oxycodone CR twice daily for at least 4 days. Thereafter, during the titration and maintenance phase participants were allowed to increase the dose every 3 days. Dose decreases were allowed without time restrictions. Oxycodone doses were thus 10, 20, 30, 40 or 50 mg twice a day (BID) were dosed by participants during 15 weeks (3 weeks titration and 12 weeks maintenance).

Baseline Measures

	Placebo Matching	Tapentadol ER	Oxycodone CR	Total
Number of Participants [units: participants]	337	319	331	987
Age [units: years] Mean ± Standard Deviation	62.2 ± 9.35	62.4 ± 9.35	61.8 ± 9.09	62.1 ± 9.26
Age, Customized [units: participants]
Between 18 and 65 years	194	194	211	599
>=65 years	143	125	120	388
Gender [units: participants]
Female	257	231	219	707
Male	80	88	112	280
Region of Enrollment [units: participants]
Portugal	8	4	3	15
Slovakia	7	8	9	24
Spain	29	23	25	77
Austria	14	12	15	41
United Kingdom	23	24	28	75
Hungary	36	35	34	105
Poland	11	11	13	35
Romania	107	103	104	314
Croatia	12	9	8	29
Germany	58	60	59	177
Latvia	24	21	24	69
Netherlands	8	9	9	26

Outcome Measures

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1. Primary:

Change From Baseline of the Average Pain Intensity Overall in the 12-week Maintenance Period of the Daily Pain Intensity on an 11-point Numeric Rating Scale (NRS). [ Time Frame: Change from baseline over the 12 week Maintenance Period ]

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2. Secondary:

Change From Baseline of the Average Pain Intensity Based on an 11-point Numerical Rating Scale (NRS) Over the Last Week of the Maintenance Period at Week 12. [ Time Frame: Change from Baseline to Week 12 of the Maintenance Period ]

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3. Secondary:

Patient Global Impression of Change [ Time Frame: Baseline; End of 12 week maintenance period ]

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4. Secondary:

Change From Baseline in the Western Ontario McMaster Questionnaire (WOMAC) Global Score Assessing Pain, Disability and Joint Stiffness of the Knee Over the Last Week of the Maintenance Period at Week 12 [ Time Frame: Change from baseline to week 12 of the maintenance period ]

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5. Secondary:

Time to Treatment Discontinuation Due to Lack of Efficacy [ Time Frame: Baseline to week 12 of the maintenance period ]

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6. Secondary:

Change in the Health Survey Scores Form (SF-36) [ Time Frame: Change From Baseline to Week 12 of the Maintenance Period ]

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7. Secondary:

EuroQol-5 (EQ-5D) Health Status Index Outcome Over Time [ Time Frame: Comparison of Baseline to Week 12 of the Maintenance Period ]

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8. Secondary:

Sleep Questionnaire: Change From Baseline in Sleep Latency Time in Hours to the Last Week of the Maintenance Period. [ Time Frame: Week 12 of the maintenance period compared to baseline ]

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9. Secondary:

Sleep Questionnaire: Amount of Time Slept in Hours [ Time Frame: Baseline to Week 12 of the maintenance period ]

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10. Secondary:

Sleep Questionnaire: Number of Awakenings During Sleep [ Time Frame: Week 12 of the maintenance period compared with baseline ]

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11. Secondary:

Number of Participants Reporting a Category From the Quality of Sleep (Sleep Questionnaire) [ Time Frame: Week 12 of the maintenance period compared to baseline ]

Show Outcome Measure 11

12. Secondary:

Patient Assessment of Constipation Symptoms (PAC-SYM) Over Time [ Time Frame: Change from Baseline to Week 12 of the Maintenance Period ]

Show Outcome Measure 12

Serious Adverse Events

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Other Adverse Events

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More Information

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Certain Agreements:

Principal Investigators are NOT employed by the organization sponsoring the study.

There IS an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.

The agreement is:

	The only disclosure restriction on the PI is that the sponsor can review results communications prior to public release and can embargo communications regarding trial results for a period that is less than or equal to 60 days. The sponsor cannot require changes to the communication and cannot extend the embargo.
	The only disclosure restriction on the PI is that the sponsor can review results communications prior to public release and can embargo communications regarding trial results for a period that is more than 60 days but less than or equal to 180 days. The sponsor cannot require changes to the communication and cannot extend the embargo.
	Other disclosure agreement that restricts the right of the PI to discuss or publish trial results after the trial is completed. Restriction Description: The Sponsor and the Sponsor's designee reserves the right to review any publication pertaining to the trial at least 30 days before it is submitted for publication. Neither party has the right to prohibit publication unless publication can be shown to affect possible patent rights.

Limitations and Caveats

Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
No text entered.

Results Point of Contact:

Name/Title: Claudia Leinweber
Organization: Grünenthal GmbH
phone: +49 241 569 2509
e-mail: claudia.leinweber@grunenthal.com

No publications provided

Responsible Party:	Grünenthal GmbH
ClinicalTrials.gov Identifier:	NCT00486811 History of Changes
Other Study ID Numbers:	335862
Study First Received:	June 14, 2007
Results First Received:	October 25, 2010
Last Updated:	January 13, 2011
Health Authority:	Czech Republic: State Institute for Drug Control; Germany: Federal Institute for Drugs and Medical Devices; Hungary: National Institute of Pharmacy; Italy: IRCCS Ospedale Maggiore di Milano; Latvia: State Agency of Medicines; Netherlands: The Central Committee on Research Involving Human Subjects (CCMO); Poland: CEBK (Centralna Ewidencja Badan Klinicznych); Portugal: Board of Hospital Distrital de Faro; Portugal: Board of Hospital Do Divino Espirito Santo de Ponta Delgada; Portugal: Board of Hospitalda Universidade de Coimbra; Portugal: Board of Hospital des. Hospital Senhora da Oliveira Guimaraes; Portugal: Board of Hospital Central do Funchal; Portugal: Board of Instituto de Reumatologia Lisboa; Romania: National Medicines Agency; Spain: Agencia Española de Medicamentos y Productos Sanitarios; France: Afssaps - French Health Products Safety Agency