appropriate use of ims...
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Appropriate Use of IMS InformationFinancial Community PresentationNovember 12, 2009
Meeting Objective
•Helping the Financial Community to understand how to optimize use of IMS offerings
−Share processes and methodologies for the IMS national audits that will aid in better understanding how to interpret publishedestimates
−Familiarize you with a few best practice approaches that will enhance your ability to utilize IMS data effectively
2 Confidential and Proprietary to IMS, November 2009
Meeting Topics
• Comparison of National Databases
• Applying Tools and Resources
• Applying Best Practices for Cross-Audit Comparisons
• Impact of Marketplace Pharmacy Practices
• Other Offerings to support Appropriate Use of IMS data
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Comparison of IMS National DatabasesKey Audit Distinctions
MANUFACTURER WAREHOUSE
RX
NON RETAIL OUTLETS
LONG TERM CAREPHARMACIES
RETAIL/MAIL PHARMACIES
Supply
(DDD™/NATIONAL SALES PERSPECTIVES™)
Demand
(Xponent™/NATIONAL PRESCRIPTION AUDIT™)
DIRECT SALES
DIRECT SALES
INDIRECT SALES
Healthcare Map
Flow of Sales and Prescriptions through the Healthcare Market
R
R
RX/APLD
RX
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The Prescription Database
The IMS US prescription database is a representative sample of Retail (Chain, Foodstore, Independent pharmacies), Mail Service and Long Term Care pharmacies.
• Measures both national and sub national dispensed prescription activity into the hands of the consumer/patient.
• Data collected from 38,000 sample pharmacies.
• ~260 million prescriptions collected each month
• More than 1.1 million prescribers representing 170 unique specialties
• Information collected from the Prescription Database creates Xponent and NPA.
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The Sales Database
• Measures both national and sub national sales dollars, units and prices of pharmaceutical drugs purchased by Retail and Non-Retail pharmacies.
• Data collected from both manufacturers’ direct sales (~ 100 pharmaceutical companies) and indirect sales from over 500 distribution centers.
• 1.5 billion transactions are processed each year.
• Information collected from the Sales Database creates DDD and NSP.
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Comparison of National DatabasesAudit Distinctions
Characteristic NSP NPA
Audit Definition National sales estimates of product packages into retail drugstores, hospitals, clinics, and other non-retail type outlets
National estimates of prescriptions, or the rate at which drugs move out of the pharmacy and into the hands of a consumer via formal dispensed prescriptions
Distribution Purchases (Supply) Dispensed Rx’s (Demand)
Source of the Data
Warehouse ship-to invoice data and manufacturer reported direct sales
Pharmacy terminal data
Channel Coverage
RetailMail (includes VA mail) LTC (includes VA Nursing Home)Clinics Federal Facilities HMOHome HealthcareMiscellaneousNon-Federal Hospital
Retail Mail (excludes VA mail)LTC (excludes VA Nursing Home)
Projections All channels projected, except Mail All channels projected
Data Availability Monthly Weekly and Monthly
Specialty No Physician Specialty Data Physician Specialty available
Reporting Timing 4-4-5 reporting Calendar reporting
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National Sales Perspectives4-4-5 Calendar for 2009
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Appropriate Use of IMS InformationApplying Tools and Resources
Available resources may explain variances
Method Recommended Usage
IMS Confidence Intervals
Confidence Intervals are built around the current estimate (i.e. +/- from the current estimate) and are good to use if the estimate needs to be compared to another number, such as a
“target,” to evaluate if two values are statistically
significantly different.
NPA Monthly Expected Change Tables
-Reflect the variations created by the number of days for each day of the week, for a given month, weighted by the relative importance of each day of the week.
-Major holidays are given their own unique weights. Provide
insight into expected month to month (year over year) trends.
Historic Variability -month to month/week to week variability
If attempting to validate a month-to-month (or week-to-week) change, historic variability will provide a range of potential values
IMS Product News Communications
May explain data anomalies or market events that are reflected in the data
Note: Typically one would not use all methods. Follow the general guidelines above on which tool is appropriate for each situation.
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Confidence Intervals
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Interpreting dataConfidence Intervals – What do they tell us?
• A Confidence Interval provides a range of values that are a “statistical tie”
−A value outside a Confidence Interval is unlikely to occur undertypical conditions
− It is said to be “statistically significantly different” from typically occurring values
−Provides “point in time” views of a data point
• Utilizing Confidence Intervals when using statistical estimates builds robustness into decisions
• IMS provides confidence interval tables for the national offerings
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Understanding estimates based on a sample
• Building “tolerance” around estimates
• Confidence interval around estimate to account for sample to sample variation:
XTrue value(unknown)
Statistical Estimate(known)
X( )
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Possible Outcomes
• If each estimate has a CI about it, then the difference is statistically significant if the two intervals DO NOT OVERLAP
( ) (( ))
• If each estimate has a CI about it, and one or both estimates fall inside interval of other then the difference is not statistically significant
( (( ) ))
• If each estimate has a CI about it, and intervals overlap but neither estimate falls inside the interval of the other then the result is inconclusive
( (( ) ))
Ŷ1 Ŷ2
Ŷ1 Ŷ2
Ŷ1 Ŷ2
1.
2.
3.
NPA Confidence IntervalsHow to apply NPA Confidence Intervals
1. Identify the appropriate Confidence Interval Table
a. Identify if the product in question is Branded or Generic, etc.
b. Use product volume for data point in question within a particular channel and locate the appropriate row (always default to lower volume)
c. Locate Channel in question (note that attached example pulls retail channel table)
d. Locate percentage for 2 standard deviations (95% confidence interval)
2. Calculate the upper and lower value and apply to target data point
a. Multiply 95% confidence interval to data point in question
b. Compare upper and lower bounds to target data point
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Are the October 2008 and November 2008 TRx volumes statistically significantly different?
Confidence Intervals Example
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= 617,054 + 2.62%
= 617,054 - 2.62%
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647,555 614,489
= 631,022 + 2.62%
= 631,022 - 2.62%
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CONCLUSION: After applying the upper and lower bounds, it can be concluded that the November 2008 TRx volume is a statistical tie to the prior month, October 2008, and therefore NOT statistically significantly different.
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600,888 614,489 633,221 647,555
Nov. 617,054
Oct.631,022
Ŷ1Ŷ2
NPA Expected Change Tables
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Interpreting DataNPA Expected Change Tables
• Removes the expected month-to-month changes to gauge a “true” percent change
• Updated to reflect the new calendar year
• NPA estimates take into consideration:
−number of days in each month
−differences in prescription volume processed through Retail, Mail and Long-Term Care pharmacies according to each day of the week
• NPA Expected Change can only be used for monthly data, not applicable for weekly trends.
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Sample NPA Expected Change Table
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NPA Expected Change TablesHow to apply NPA Expected Change
1. Identify appropriate Expected Change table
− Retail, Mail Service or Long-Term Care
2. Calculate month-over-month percent change
− (Current month – Previous month)/Previous month
3. Compare month-over-month observed percent change to month-over-month expected change
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Expected Change Example
• What is the “true” fluctuation in NPA Retail volume from January 2008 to February 2008 if you back out the variance due to the number of days in the month and differences in volume processed by each day of the week?
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CONCLUSION: After applying the expected change to the observed growth, the smoothed change for Product A is -4.29%.
Instructions1.Calculate % change over preceding Month.
2.Identify observed % change and subtract the “expected” % change from the chart.
Example: [(-9.39) – (-5.10) = -4.29%]
3. Result is a “smoothed” % change which eliminates the effect of changing the distribution of weekdays.
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Historic Variability
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Interpreting dataWhat is a historic variability trend?
• Provides a range of potential values when attempting to validate month-to-month or week-to-week changes.
• Historic variability creates tolerance bands that account for the natural variation over time.
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Interpreting the data “Normal variations” exist in trends over time
• Quantify historic month-to-month % variation; and use to distinguish if current period change is reflective of normal trend
Month to Month Percent Change in TRx Volume: Aug 06 to Jul 08
(Product A Oral Solid)
-15.0%
-10.0%
-5.0%
0.0%
5.0%
10.0%
15.0%
Aug-06 Sep-06 Oct-06 Nov -06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May -07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov -07 Dec-07 Jan-08 Feb-08 Mar-08 Apr-08 May -08 Jun-08 Jul-08
% C
hange in T
Rxs
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Apply ResourcesCreating month-to-month historic variability in Excel
Use Average and Standard Deviation (two Excel built-in functions in functions list) and create your upper and lower bounds for acceptable variability in the month-to-month change.
All the computations are listed here.
Column A: Sort months in ascending order
Column B: TRx Volume
Column C: Calculate % change (see formula)
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Historic Variability Example
• Is the published IMS TRx growth estimate for the September 2008 data month consistent with the historic variability for this product?
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Apply ResourcesHow to calculate and apply Historic Variability
1. Calculate month over month or week over week percentage change: (Current time period –Previous time period)/Previous time period
2. Calculate average percentage change based on 24 historical time periods, not including the period in question [AVERAGE formula]
3. Calculate standard deviation [STDEV formula]
4. Calculate upper and lower variability tolerance based on 2 standard deviations [Average +/- (2*stdev)]
5. Compare upper and lower variability tolerance to percent change
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CONCLUSION: The variance is within acceptable historic variability for the period (i.e., -8.14% is between -9.2% and 15.7%).
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Interpreting dataExamining Historic Variability
• Use for any estimate tracked over time: volumes, shares, dollars, quantities (extended units)
• Use for tracking time periods: monthly, weekly, daily (examine by day of week),
• Use for tracking products: Generics, Brands, or USC Therapeutic Categories, etc.
• Remove obvious differences among time periods prior to creating bounds
• Use with at least 24 time periods and two (2) Standard Deviations
• Our recommendations for tighter bounds:
• Trend % change as opposed to volume when tracking new products (get closer to normal approximation)
• Apply expected change tables when tracking monthly Rx volumes of drugs in NPA (accounts for shorter months, etc.)
• For monthly NSP dollars and extended units, divide by number of weeks in month and apply bounds to average weekly numbers (to account for 4-4-5 calendar month)
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IMS Communications
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Review IMS Communications
If, after applying the resource applications, questions still exist, review IMS Product News:
• Market event
• Enhancement
• Advisory
• Follow-up
If applicable, apply guidance, and analyze impact reporting results
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Interpreting IMS National Estimates
Step 1:
Data is published
Step 2:
Apply Resources
Step 4:
Contact IMS
Receive published estimate
Interpret data in light of market & company knowledge
Calculate Confidence Intervals
Apply NPA Expected Change Tables, if applicable
Analyze data in light of Historic Variability
Step 3:
IMS Communication
If questions exist:
Review published Product News communications
Apply Guidance and analyze impact reporting results, if applicable
If questions exist:
Contact your IMS Account representative for initiation of a data investigation
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Applying Tools and ResourcesClosing summary
• A true picture of the market is extremely intricate and multi-faceted due to multiple sources of variation
• IMS is well positioned to handle the market intricacies and variation
−IMS captures a robust and broad sample
−Utilizes our patented estimation method
−Employs data collection and communication best practices
• In conjunction with IMS, the Financial Community can employ practices that:
−Distinguish normal variation from true performance indicators byusing tolerance bands
−Set expectations that volume fluctuations, regardless of root cause, that fall within normal expected bands do not represent statistical differences
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Guidelines for National Database ComparisonsApplying Best Practices
Guidelines for Comparing AuditsMarket Definitions
• When comparing sales and prescription data, always ensure that market definitions, channel definitions, product/product groupings, forms, or strengths match across IMS databases.
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Guidelines for Comparing AuditsMetrics
• Dollars are not the recommended measurement to use when comparing sales and prescription data.
Price Amount Source
Pharmacy Retail
Price
$2.20 NPA
Pharmacy
(Transaction)
Acquisition Price
$1.65 NSP Retail
Wholesaler
Acquisition Cost
(WAC)
$1.75 DDD
Example Price per Extended Unit:
Product “A” 10mg Tablet
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Guidelines for Comparing AuditsMetrics, continued
• Prescriptions are NOT the recommended measure to use when comparing sales and prescription data
• Extended Units ARE the recommended measure when comparing sales and prescription activity
−Prescription Extended Units generally correlate to NSP Extended Units
• Extended Units may vary depending upon pharmacy reporting practices
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Example of Data Measure Distinctions NSP and NPA: Impact of Extended Unit (EU) definitions
Source: NSP Extended Units (EU RET) and NPA Extended Unit Total Dispensed Prescriptions (EUTRx)
Pack configuration:12 tubes of .25 grams
• NSP Extended Units= # of grams
• NPA Extended Units= # of tubes
Once NPA is factored to represent grams, NSP and NPA show similar volume trends
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Guidelines for Comparing AuditsTime Periods
• A three-month rolling average is the recommended time period to use
Formula:
(3 months summed) divided by 3 = three-month rolling average
• (January + February + March) / 3
• (February + March + April) / 3
• (March + April + May) / 3
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Guidelines for Comparing AuditsChannels
• Traditional Retail Channels are suggested for cross-audit comparisons
−Traditional Retail Channels (Chain, Independent, Foodstore pharmacies) are reported across both the sales and prescription databases and are by definition, similar.
− Long-Term Care Channels are reported across both the sales and prescription databases and are by definition, similar.
−Mail Service definitions across databases are dissimilar.
• Projections
• VA Mail
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Case StudyComparing data from two audits: Dollars vs. Dispensed Rxs
Source: NSP Dollars (DOL TOT) and NPA Total Dispensed Prescriptions (TRx)
Why are NPA and NSP volumes and trends NOT SIMILAR?
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Applying Guidelines
Step 1:
Compare
Step 2:
Metrics
Step 4:
Channels
� Identify key audit distinctions
� Market Definitions
� Product/Product Groupings
� Form and Strength
� Use Extended Units
� Ensure Extended Unit definitions across databases are the same
Step 3:
Time Periods
� Recommend three month rolling average
� Compare Channels�Retail:ChainIndependentFoodstores
�LTC
� Mail dissimilar�Projections
�VA Mail differences
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Applying GuidelinesStep 1
Step 1:
Compare
Step 2:
Metrics
Step 4:
Channels/ Subcats
� Identify key audit distinctions
� Market Definitions
� Product/Product Groupings
� Form and Strength
Ste 3:
Time Periods
NSP NPA
Dollars Prescriptions
4-4-5 Schedule Calendar Month
Retail, Mail, LTC & Non-Retail
Retail, Mail, LTC
VA Mail Included VA Mail Excluded
Unprojected Mail Projected Mail
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Applying GuidelinesSteps 2 and 3
Step 2:
Metrics
� Use Extended Units
� Ensure Extended Unit definitions across databases are the same
Step 3:
Time Periods
� Recommend three-month rolling average
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Case StudyComparing data from two audits
NSP reporting is 4-4-5 vs. NPA calendar reporting.
NSP Dollars
NPA TRXs
Source: NSP Dollars (DOL TOT) and NPA Total Dispensed Prescriptions (TRx)
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Apply Appropriate Use Metrics and Time PeriodsExtended Units and Average Rolling Months applied
Source: NSP Extended Units (EU TOT) and NPA Extended Unit Total Dispensed Prescriptions (EUTRx)
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Applying GuidelinesStep 4
Step 1:
Compare
Step 2:
Metrics
Step 4:
Channels
Step 3:
Time Periods
� Compare Channels�Retail:ChainIndependentFoodstores
�LTC
� Mail dissimilar�Projections
�VA Mail differences
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Apply Appropriate Use ChannelsLike Channels applied (Chain, Independent, Foodstore, Mail & LTC)
Source: NSP Extended Units (EU TOT) and NPA Extended Unit Total Dispensed Prescriptions (EUTRx)
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Further Break-out of Like ChannelsRetail Channel view (Chain, Independent and Foodstore)
Source: NSP Extended Units (EU TOT) and NPA Extended Unit Total Dispensed Prescriptions (EUTRx)
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Applying Guidelines
Step 1:
Compare
Step 2:
Metrics
Step 4:
Channels
� Identify key audit distinctions
� Market Definitions
� Product/Product Groupings
� Form and Strength
� Use Extended Units
� Ensure Extended Unit definitions across databases are the same
Step 3:
Time Periods
� Recommend three month rolling average
� Compare Channels�Retail:ChainIndependentFoodstores
�LTC
� Mail dissimilar�Projections
�VA Mail differences
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NPA Rx Measures Marketplace Dynamics of Pharmacy Practices
IMS definition of New, Refill and Total Rx
• NRx
−Prescriptions issued by the pharmacy with a unique prescription number
−A new prescription may or may not represent new therapy for the patient receiving the prescription
• Refill
−Prescriptions issued under the same prescription number as an original (new) prescription previously recorded by the reporting pharmacy. Refill prescriptions are necessary for seeing the total prescription volume for a product or market
• TRx
−New prescriptions plus refill prescriptions reported by pharmacies.
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Standard pharmacy “New Rx” designation practice
Patient presents new prescription at pharmacy with refills
Prescriber writes a new Rx
Pharmacist
•Inputs required adjudication and tracking information
Pharmacy System
•Generates a unique Rx number and flags that as ‘New Rx”•Most Pharmacies track all subsequent Refill Rx identified with the same prescription number
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Some pharmacy business processes may cause variation in NRx measures that may not be indicative of a new prescription being presented at the pharmacy
1. Pharmacy assigns a new prescription number to a “refill” when dispensed NDC number changes. This may occur when:
� Pharmacy changes the source of a generic or brand product (repackager) resulting in a new dispensed NDC
� Pharmacy stocks a different package size than traditionally stocked, resulting in a different NDC
� Patient may switch from brand to generic, or vice-versa
� Managed Care guidelines may require a New Rx yearly, or twice per year
2. Retail, Mail or LTC Supplier changes dispensing location, resulting in an assignment of a new prescription number
Examples
However some exceptions do exist
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Common Drivers of Pharmacy PracticesInfluences on New to Refill Ratios
• Drivers of this practice may include:
−Supply shortage of a specific manufacturer’s generic product; in some cases this will result in the pharmacy sourcing the product from another manufacturer
−New pharmacy product package size introduced into the market
−A mail service pharmacy reallocates workload by transferring scripts to satellite pharmacies
• What to anticipate:
−A temporary increase in NRx measures with no corresponding increase in TRx measures
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Recommendations
• To the degree you are aware of this type of market event, use prior or subsequent NRx/RRx ratios
− Use the average of the most recent 6-8 non-impacted weeks, prior to any NRx market event occurring
− Exclude holiday weeks, in case there are unusual distribution during these time periods
• IMS continues to work with our data suppliers to mitigate the impact of these sorts of unusual data handling practices.
• IMS longitudinal prescription information will assist in minimizing Retail supplier based changes in NRx.
− Longitudinal prescription services categorize prescriptions using anonymous patient IDs, measuring New to Brand (NBRx) or New Therapy Start prescriptions.
− These services offer alternatives that alleviate NRx fluctuations and enable greater insight into drivers of TRx performance
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Other IMS Offerings
�New To Brand�Portfolio Profiler�NSP and NPA Pricing Measures Database
NPA New to BrandMeasuring true new prescription activity
• A national key performance indicator that integrates industry-leading NPA with de-identified patient-level data
• Provides enhanced visibility to the volume of true, first-time prescriptions on a brand
• Only longitudinally-derived metric offered across all products and markets
• Accessible through investigator.web™ and Dataview™
• Additional, more granular insight provides a lead indicator of a brand’s ability to capture true new business
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The full impact of the Avandia safety news played-out in two weeks through the New-to-Brand metric, while the impact as measured by NRx and TRx is still playing-out
Avandia Share
0%
3%
6%
9%
12%
Jul 2
8 06
Aug
18
06S
ep 0
8 06
Sep
29
06O
ct 2
0 06
Nov
10
06D
ec 1
06
Dec
22
06Ja
n 12
07
Feb 2
07
Feb 2
3 07
Mar
ch 1
6 07
Apr
il 06
07
Apr
il 27
07
May
18
07Ju
ne 8
07
June
29
07Ju
ly 2
0 07
Aug
10
07A
ug 3
1 07
Sep
21
07O
ct 1
2 07
Nov
2 0
7N
ov 2
3 07
Dec
14
07Ja
n 04
08
Total Rx New Rx New to Brand
TRx share loss 2.96% pts NRx share loss 3.8% ptsNBRx share loss 5.4% pts
The NBRx share loss represents 8,073 NBRx prescriptions per week
Case Example
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IMS MIDAS Portfolio Profiler (Launching in December 2009)
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Tracks Global Company Performance, Market Trends, and enables users to project potential merger impact
•Global IMS MIDAS Data available at 4 levels & 3 measures– Corporation/ Country/ International-Product/ ATC3 Therapeutic Category
– USD (US Dollars)/ LCD (Local Currency Dollars)/ SU (Standard Units)
•Breakout coverage of 15 markets– Core: EU5 (Top 5 European countries); US, Canada & Japan
– Pharmerging: BRICK TM (Brazil, Russia, India, China, Korea; Turkey & Mexico)
– ROW - Rest of World bucket (Quarterly Only)
•Data updated monthly where available & for all countries quarterly
– Monthly data points will be updated weekly until all monthly panels are live
•Hosted and secured on the IMS Customer Portal
•Delivery – Online Graph, Grid and Data Manipulation
– Export to Excel, PowerPoint and PDF files
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Dashboard View
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Country View (filtered)
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Data Grid View
NPA Pricing Measures Database
The National Prescription Audit™ has key insights into actual Retail/Consumer pricing.
•Using Retail Costs derived from pharmacy terminals, NPA provides a valuable reference point for comparing Retail Costs per Rx generated by products within a competitive mix.
− Delivered as a Dataview™ database via File Express through the IMS Customer Portal
− Includes all markets
− Most recent three years of pricing history
− Available as a Monthly, or Quarterly Dataview database subscription
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NPA Pricing Measures - Sample Report
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Summary
−Identified key distinctions across the National Sales Perspectives and the National Prescription Audit databases
− Introduced and applied new tools & resources
• Confidence Intervals
• Expected Change
• Historic Variability trend
−Reviewed and applied guidelines for database comparisons
−Highlighted marketplace dynamics of pharmacy practices
−Outlined some additional IMS offerings to support Financial Community customers in the use of IMS data
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Questions?
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Cathy JeffersonService ManagerTel. (610) [email protected]
Kathy Constable Senior Client Service AnalystTel. (610) 832-5879 [email protected]
IMS Client Service Team: