edc-reportable 0.1.24

Reportable clinic events, reference ranges, grading

edc-reportable

Reportable clinic events, reference ranges, grading

from dateutil.relativedelta import relativedelta
from edc_utils import get_utcnow
from edc_constants.constants import MALE, FEMALE
from edc_reportable import ValueReferenceGroup, NormalReference, GradeReference
from edc_reportable import site_reportables
from edc_reportable.tests.reportables import normal_data, grading_data

Create a group for each test:

neutrophils = ValueReferenceGroup(name='neutrophils')

A normal reference is declared like this:

   ref = NormalReference(
       name='neutrophils',
       lower=2.5,
       upper=7.5,
       units='10e9/L',
       age_lower=18,
       age_upper=99,
       age_units='years',
       gender=[MALE, FEMALE])

   ref

NormalReference(neutrophils, 2.5<x<7.5 10e9/L MF, 18<AGE<99 years)

And added to a group like this:

neutrophils.add_normal(ref)

Add as many normal references in a group as you like, just ensure the lower and upper boundaries don’t overlap.

Note: If the lower and upper values of a normal reference overlap with another normal reference in the same group, a BoundaryOverlap exception will be raised when the value is evaluated. Catch this in your tests.

A grading reference is declared like this:

g3 = GradeReference(
    name='neutrophils',
    grade=3,
    lower=0.4,
    lower_inclusive=True,
    upper=0.59,
    upper_inclusive=True,
    units='10e9/L',
    age_lower=18,
    age_upper=99,
    age_units='years',
    gender=[MALE, FEMALE])

>>> g3
GradeReference(neutrophils, 0.4<=x<=0.59 in 10e9/L GRADE 3, MF, 18<AGE<99 in years) GRADE 3)

And added to the group like this:

neutrophils.add_grading(g3)

Declare and add a GradeReference for each reportable grade of the test.

Note: If the lower and upper values of a grade reference overlap with another grade reference in the same group, a BoundaryOverlap exception will be raised when the value is evaluated. Catch this in your tests.

Declaring with parse

You may find using parse somewhat simplifies the declaration where lower, lower_inclusive, upper and upper_inclusive can be written as a phrase, like 13.5<=x<=17.5. For example:

age_opts = dict(
    age_lower=18,
    age_upper=120,
    age_units='years',
    age_lower_inclusive=True,
    age_upper_inclusive=True)

normal_data = {
    'haemoglobin': [
        p('13.5<=x<=17.5', units=GRAMS_PER_DECILITER,
          gender=[MALE], **age_opts),
        p('12.0<=x<=15.5', units=GRAMS_PER_DECILITER, gender=[FEMALE], **age_opts)],
     ...
}

Registering with site_reportables

Once you have declared all your references, register them

site_reportables.register(
    name='my_project',
    normal_data=normal_data,
    grading_data=grading_data)

Important:

Writing out references is prone to error. It is better to declare a dictionary of normal references and grading references. Use the parse function so that you can use a phrase like 13.5<=x<=17.5 instead of a listing attributes. There are examples of complete normal_data and grading_data in the tests. See``edc_reportable.tests.reportables``.

You can export your declared references to CSV for further inspection

>>> site_reportables.to_csv(name='my_project', path='~/')

('/Users/erikvw/my_project_normal_ranges.csv',
'/Users/erikvw/my_project_grading.csv')

Using your reportables

In your code, get the references by collection name:

my_project_reportables = site_reportables.get('my_project')

neutrophil = my_project_reportables.get('neutrophil')

report_datetime = get_utcnow()
dob = (report_datetime - relativedelta(years=25)).date()

Check a normal value

If a value is normal, get_normal returns the NormalReference instance that matched with the value.

# evaluate a normal value
normal = neutrophil.get_normal(
    value=3.5, units='10^9/L',
    gender=MALE, dob=dob, report_datetime=report_datetime)

# returns a normal object with information about the range selected
>>> normal.description
'2.5<=3.5<=7.5 10^9/L MF, 18<=AGE years'

Check an abnormal value

If a value is abnormal, get_normal returns None.

# evaluate an abnormal value
opts = dict(
    units='10^9/L',
    gender=MALE, dob=dob,
    report_datetime=report_datetime)
normal = neutrophil.get_normal(value=0.3, **opts)

# returns None
>>> if not normal:
        print('abnormal')
'abnormal'

To show which ranges the value was evaluated against

# use same options for units, gender, dob, report_datetime
>>> neutrophil.get_normal_description(**opts)
['2.5<=x<=7.5 10^9/L MF, 18<=AGE years']

Check if a value is “reportable”

grade = neutrophil.get_grade(
    value=0.43, units='10^9/L',
    gender=MALE, dob=dob, report_datetime=report_datetime)

>>> grade.grade
3

>>> grade.description
'0.4<=0.43<=0.59 10^9/L GRADE 3'

grade = neutrophil.get_grade(
    value=0.3, units='10^9/L',
    gender=MALE, dob=dob, report_datetime=report_datetime)

>>> grade.grade
4

>>> grade.description
'0.3<0.4 10^9/L GRADE 4'

If the value is not evaluated against any reportable ranges, a NotEvaluated exception is raised

# call with the wrong units

>>> grade = neutrophil.get_grade(
        value=0.3, units='mmol/L',
        gender=MALE, dob=dob, report_datetime=report_datetime)

    NotEvaluated: neutrophil value not graded. No reference range found ...