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Comparaison of percentages on matched series

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iheb bougmiza

Comparaison of percentages on matched series

Hello,
I have a series of 30 patients for whom, I made a series of 3 examinations (exam1, exam2 and exam3) to reveal a fracture.
Finally, the fracture was revealing in 30 %, 50 % and 60 . How may I know if it exists or not a significant difference between these percentages. It is about matched series, isn't it? I know the test of Mc Nemar which is applicable for 2 percentages on matched series and for 3 percentages how can it be done?
Thank you in advance

Mohamed Iheb BOUGMIZA

Assistant Hospitalo - Universitaire
Département de Médecine Communautaire
Faculté de Médecine de sousse
Avenue Mohamed El karoui
Sousse 4002, Tunisie

Tel : + 216 73 222600 / +216 99 17 17 26
Fax : + 216 73 224899

---------------------------------
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Swank, Paul R

Re: Comparaison of percentages on matched series

Sounds like you need a generalized estimating equation (GEE). Does someone know if you can do that in SPSS?

Paul R. Swank, Ph.D.
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center - Houston

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Iheb Bougmiza
Sent: Friday, December 28, 2007 3:45 AM
To: [hidden email]
Subject: Comparaison of percentages on matched series

Hello,
I have a series of 30 patients for whom, I made a series of 3 examinations (exam1, exam2 and exam3) to reveal a fracture.
Finally, the fracture was revealing in 30 %, 50 % and 60 . How may I know if it exists or not a significant difference between these percentages. It is about matched series, isn't it? I know the test of Mc Nemar which is applicable for 2 percentages on matched series and for 3 percentages how can it be done?
Thank you in advance

Mohamed Iheb BOUGMIZA

Assistant Hospitalo - Universitaire
Département de Médecine Communautaire
Faculté de Médecine de sousse
Avenue Mohamed El karoui
Sousse 4002, Tunisie

Tel : + 216 73 222600 / +216 99 17 17 26
Fax : + 216 73 224899

---------------------------------
Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail

=====================
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Marta Garcia-Granero

Re: Comparaison of percentages on matched series

Use Cochran test (it is the extension of McNemar's test to more than two
samples).

Best regards,
Marta García-Granero

>
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Iheb Bougmiza
> Sent: Friday, December 28, 2007 3:45 AM
> To: [hidden email]
> Subject: Comparaison of percentages on matched series
>
> Hello,
> I have a series of 30 patients for whom, I made a series of 3 examinations (exam1, exam2 and exam3) to reveal a fracture.
> Finally, the fracture was revealing in 30 %, 50 % and 60 . How may I know if it exists or not a significant difference between these percentages. It is about matched series, isn't it? I know the test of Mc Nemar which is applicable for 2 percentages on matched series and for 3 percentages how can it be done?
> Thank you in advance
>
>
> Mohamed Iheb BOUGMIZA
>
> Assistant Hospitalo - Universitaire
> Département de Médecine Communautaire
> Faculté de Médecine de sousse
> Avenue Mohamed El karoui
> Sousse 4002, Tunisie
>
>
> Tel : + 216 73 222600 / +216 99 17 17 26
> Fax : + 216 73 224899
>
>
>
> ---------------------------------
> Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
>

Kylie Lange

Re: Comparaison of percentages on matched series

In reply to this post by Swank, Paul R

GEE was added to the Advanced Models module in version 15. It's in the
menu under Generalized Linear Models.

Cheers,
Kylie.

On 3/01/2008 5:27 AM, Swank, Paul R wrote:

> Sounds like you need a generalized estimating equation (GEE). Does someone know if you can do that in SPSS?
>
> Paul R. Swank, Ph.D.
> Professor and Director of Research
> Children's Learning Institute
> University of Texas Health Science Center - Houston
>
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Iheb Bougmiza
> Sent: Friday, December 28, 2007 3:45 AM
> To: [hidden email]
> Subject: Comparaison of percentages on matched series
>
> Hello,
> I have a series of 30 patients for whom, I made a series of 3 examinations (exam1, exam2 and exam3) to reveal a fracture.
> Finally, the fracture was revealing in 30 %, 50 % and 60 . How may I know if it exists or not a significant difference between these percentages. It is about matched series, isn't it? I know the test of Mc Nemar which is applicable for 2 percentages on matched series and for 3 percentages how can it be done?
> Thank you in advance
>
>
> Mohamed Iheb BOUGMIZA
>
> Assistant Hospitalo - Universitaire
> Département de Médecine Communautaire
> Faculté de Médecine de sousse
> Avenue Mohamed El karoui
> Sousse 4002, Tunisie
>
>
> Tel : + 216 73 222600 / +216 99 17 17 26
> Fax : + 216 73 224899
>
>
>
> ---------------------------------
> Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>

Art Kendall-2

Re: Comparaison of percentages on matched series

In reply to this post by Swank, Paul R

two pastes from help in version 16.
---
Obtaining Generalized Estimating Equations

This feature requires the Advanced Models option.

From the menus choose:

Analyze
Generalized Linear Models
Generalized Estimating Equations...

---

GENLIN
{dependent-var [(REFERENCE = {LAST**})] [(ORDER = {ASCENDING**})]}
{FIRST } {DESCENDING }
{value } {DATA }

{events-var OF {trials-var} }
{n }

[BY factor-list [(ORDER = {ASCENDING**})]]
{DESCENDING }
{DATA }

[WITH covariate-list]

[/MODEL [effect-list] [INTERCEPT = {YES**}]
{NO }

etc,
---

Art Kendall
Social Research Consultants

Swank, Paul R wrote:

> Sounds like you need a generalized estimating equation (GEE). Does
> someone know if you can do that in SPSS?
>
> Paul R. Swank, Ph.D. Professor and Director of Research Children's
> Learning Institute University of Texas Health Science Center -
> Houston
>
>
> -----Original Message----- From: SPSSX(r) Discussion
> [mailto:[hidden email]] On Behalf Of Iheb Bougmiza Sent:
> Friday, December 28, 2007 3:45 AM To: [hidden email]
> Subject: Comparaison of percentages on matched series
>
> Hello, I have a series of 30 patients for whom, I made a series of 3
> examinations (exam1, exam2 and exam3) to reveal a fracture. Finally,
> the fracture was revealing in 30 %, 50 % and 60 . How may I know if
> it exists or not a significant difference between these percentages.
> It is about matched series, isn't it? I know the test of Mc Nemar
> which is applicable for 2 percentages on matched series and for 3
> percentages how can it be done? Thank you in advance
>
>
> Mohamed Iheb BOUGMIZA
>
> Assistant Hospitalo - Universitaire Département de Médecine
> Communautaire Faculté de Médecine de sousse Avenue Mohamed El karoui
> Sousse 4002, Tunisie
>
>
> Tel : + 216 73 222600 / +216 99 17 17 26 Fax : + 216 73 224899
>
>
>
> --------------------------------- Ne gardez plus qu'une seule adresse
> mail ! Copiez vos mails vers Yahoo! Mail
>
> ===================== To manage your subscription to SPSSX-L, send a
> message to [hidden email] (not to SPSSX-L), with no body
> text except the command. To leave the list, send the command SIGNOFF
> SPSSX-L For a list of commands to manage subscriptions, send the
> command INFO REFCARD
>
> ===================== To manage your subscription to SPSSX-L, send a
> message to [hidden email] (not to SPSSX-L), with no body
> text except the command. To leave the list, send the command SIGNOFF
> SPSSX-L For a list of commands to manage subscriptions, send the
> command INFO REFCARD
>
>

Ornelas, Fermin-2

Re: Comparaison of percentages on matched series

In reply to this post by Marta Garcia-Granero

You could also use the Jonkeree-Terpestra Test where Ha: M1<M2<M3.

Fermin Ornelas, Ph.D.
Management Analyst III, AZ DES
1789 W. Jefferson Street
Phoenix, AZ 85032
Tel: (602) 542-5639
E-mail: [hidden email]

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Marta García-Granero
Sent: Wednesday, January 02, 2008 12:29 PM
To: [hidden email]
Subject: Re: Comparaison of percentages on matched series

Use Cochran test (it is the extension of McNemar's test to more than two
samples).

Best regards,
Marta García-Granero

=====================
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=====================
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Marta Garcia-Granero

Re: Comparaison of percentages on matched series

"You could also use the Jonkeree-Terpestra Test where Ha: M1<M2<M3."

Don't do that. This test requires the EXACT TESTS module installed, and,
besides, it is for independent samples only, not related, and for
ordinal, or quantitative, dependent variables. Use Cochran test,
followed by pairwise McNemar's tests as post-hoc method (adjusting the
p-values).

Best regards,
Marta García-Granero

> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Marta García-Granero
> Sent: Wednesday, January 02, 2008 12:29 PM
> To: [hidden email]
> Subject: Re: Comparaison of percentages on matched series
>
> Use Cochran test (it is the extension of McNemar's test to more than two
> samples).
>
>
>> -----Original Message-----
>> From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Iheb Bougmiza
>> Sent: Friday, December 28, 2007 3:45 AM
>> To: [hidden email]
>> Subject: Comparaison of percentages on matched series
>>
>> Hello,
>> I have a series of 30 patients for whom, I made a series of 3 examinations (exam1, exam2 and exam3) to reveal a fracture.
>> Finally, the fracture was revealing in 30 %, 50 % and 60 . How may I know if it exists or not a significant difference between these percentages. It is about matched series, isn't it? I know the test of Mc Nemar which is applicable for 2 percentages on matched series and for 3 percentages how can it be done?
>>