You want to study whether adult patients with intraoperative hypotension have an increased risk of 30
day all-cause post-operative mortality.
First define Inclusion criteria




Age between 18 and 100
“valid” preoperative SBP, 90-250
“valid” preoperative DBP, 60-230
ASA 1-4, no ASA E patients
Then put these in MPOG format:
Source
AIMS
Data Column
Age in years
Data type
MPOG source table, column, and MPOG
and range
concept ID
Numeric, 18
Aims_intraopcaseinfo.AIMS_age_in_years
–100
Preoperative
Numeric, 90-
AIMS_Preop, MPOG Concept ID 70212
baseline SBP
250
Preoperative
Numeric, 60-
baseline DBP
230
Preoperative
Numeric
Calculated from above two values
ASA status
Numeric 1-4;
AIMS_Preop, MPOG Concept ID 70233, parsed
converted to
not inclusive
to numeric only; hand review may be necessary
numeric
of “E”
to confirm this.
AIMS_Preop, MPOG Concept ID 70211
baseline MAP
Then define your exclusion criteria
 No cardiac/cardiothoracic patients
Expressed in MPOG format:
AIMS
Cardiac/cardio Character,
AIMS_intraopcaseinfo,
thoracic
Exclude
service
mpog_primary_procedural_service_concept_id
= 80005, 80013
Finally, request other patient/population descriptors that you anticipate using for your statistical
analysis
Source
Data Column
Data type
MPOG source table, column, and MPOG
concept ID
AIMS
Gender
Character
Aims_patients.AIMS_sex
Procedure
Character
Aims_intraopcaseinfo.aims_actual_procedure_t
name
ext
(performed,
not
scheduled)
Procedure
character
diagnosis
Primary
Aims_intraopcaseinfo.aims_preoperative_diagn
osis_text
Character
Aims_billingprocedures.primary_surgery_cpt
Character
Aims_billingprocedures.aims_anesthesia_cpt
Character
AIMS_Preop, MPOG Concept ID 70079
Character
AIMS_Preop, MPOG Concept ID 70125
surgery CPT
code
Primary
anesthesia
base CPT
Home
medications
Social history
(smoking)
Past surgical
Character
AIMS_Preop, MPOG Concept ID 70105
Hypertension
Character
AIMS_Preop, MPOG Concept ID 70031
Previous
Character
AIMS_Preop, MPOG Concept ID 70033
Character
AIMS_Preop, MPOG Concept ID 70027
Character
AIMS_Preop, MPOG Concept ID 70026
Character
AIMS_Preop, MPOG Concept ID 70034
COPD
Character
AIMS_Preop, MPOG Concept ID 70115
Sleep apnea
Character
AIMS_Preop, MPOG Concept ID 70122
Pulmonary -
Character
AIMS_Preop, MPOG Concept ID 70117
Renal failure
Character
AIMS_Preop, MPOG Concept ID 70060
Liver disease
Character
AIMS_Preop, MPOG Concept ID 70052
Diabetes
Character
AIMS_Preop, MPOG Concept ID 70046
Neuro sign/sx
Character
AIMS_Preop, MPOG Concept ID 70094
Neuro - other
Character
AIMS_Preop, MPOG Concept ID 70090
Body mass
Numeric, 0 –
AIMS_Preop, MPOG Concept ID 70253
history
myocardial
infarction
Coronary
artery disease
Congestive
heart failure
Cardiac other
other
index
100
Weight in kg
Numeric, 0 –
AIMS_Preop, MPOG Concept ID 70264
1000
Case length in
Numeric, 0 –
AIMS_IntraopNotes, MPOG Concept ID
minutes
1000
3281/3289; used to calculate the number of 10
(patient in
minute epochs
room to
patient out of
room)
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <80
3015
100
SBP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <70
3015
100
SBP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <60
3015
100
SBP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <60
3025
100
MAP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <50
3025
100
MAP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs <40
3025
100
MAP
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 30%
3015
100
↓ SBP from
baseline
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 40%
3015
100
↓ SBP from
baseline
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 50%
3015
100
↓ SBP from
baseline
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 30%
3025
100
↓ MAP from
baseline
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 40%
3025
↓ MAP from
100
baseline
# of 10 minute Numeric, 0 -
AIMS_IntraopPhysiologic, MPOG Concept ID
epochs 50%
100
3025
Date
N/a; Hand review of other sources may be
↓ MAP from
baseline
Death
Date of death
master
if match in
index
social security
necessary to confirm status
death master
file based
upon SSN &
soundex (last
name)
To find concepts for your own projects, please
visit:
https://mpog.med.umich.edu/concept.html