The dataset consists of three files containing timeseries entries, an overview of all treatment sessions and an overview of all patients. To reduce the amount of data only a subset of patients has records in the timeseries data. This modified dataset originates from the following paper:
Lin, CJ., Chen, YY., Pan, CF. et al. Dataset supporting blood pressure prediction for the management of chronic hemodialysis. Sci Data 6, 313 (2019). https://doi.org/10.1038/s41597-019-0319-8
To get into a discussion please prepare a short presentation (15min) on the following questions and tasks.
- What is hemodialysis about?
- What are challenges patients and doctors are facing in this domain? What is intradialytic hypotension (IDH)?
- Identify three influencing factors that may be correlated to IDH.
- Finally perform an exploratory data analysis and investigate the influence of the previously identified factors on IDH using the given dataset.
The different datasets can by link by patient_id and treatment_id. In the treatment overview and patient data columns starting with min, max and avg are computed by calculating the minimum, maximum and average value of the respected column regarding a single treatment or a specific patient. A description of the columns is given in the tables below. Columns starting with min, max, avg are not listed.
| Column | Description |
|---|---|
patient_id |
Patient ID |
date_of_treatment |
Date of treatment |
session_number |
Number of session for patient |
minute_of_treatment |
Minute of measurement |
tsp_dialysisstart |
Date and time of dialysis start |
tsp_dialysisend |
Date and time of dialysis end |
dialysis_lengh_in_m |
Duration of dialysis session |
sbp_systolic_blood_pressure |
Systolic blood pressure [mmHg] |
dbp_diastolic_blood_pressure |
Diastolic blood pressure [mmHg] |
dialysate_temp_value |
Dialysate temperature [°C] |
conductivity |
Conductivity of dialysate [mS/cm] |
uf_ultrafiltration_rate |
Ultrafiltration rate [l/h] |
blood_flow |
Blood flow [ml/min] |
bp_measurement_number |
Count of blood pressure measurement. |
is_hypotension |
If sbp_systolic_blood_pressure is lower than 90mmHg the entry is marked as true. |
ts_measurement |
The absolute timestamp of the measurement averaged to 1 minute. |
change_sbp_to_last_m |
Shows how the systolic blood pressure has changed in comparison to one minute ago. |
change_dbp_to_last_m |
Shows how the diastolic blood pressure has changed in comparison to one minute ago. |
change_uf_to_last_m |
Shows how the Ultrafiltration Rate was changed in comparison to one minute ago. |
uf_was_stopped_counter |
One if Ultrafiltration Rate was set to zero and one minute ago it was not zero. |
blood_flow_was_stopped_counter |
One if blood_flow Rate was set to zero and one minute ago it was not zero. |
change_blood_flow_to_last_m |
Shows how the Blood Flow was changed in comparison to one minute ago. |
change_conductivity_to_last_m |
Shows how the conductivity was changed in comparison to one minute ago. |
treatment_id |
Treatment ID |
| Column | Description |
|---|---|
patient_id |
Patient ID |
date_of_treatment |
Date of treatment |
session_number |
Number of session for patient |
birthday |
Birthday |
first_dialysis |
Date of first dialysis |
has_diabetes |
Boolean indicating if a patient has diabetes. |
gender |
Gender oft he patient |
age_at_first_dialysis |
Calculated from “Year of first dialysis” – “year of birth” |
time_in_hypotension_m |
count of minutes in timeseries where is_hypotension = true |
pct_time_in_hypotension |
Calculated from time_in_hypotension_m / dialysis_lengh_in_m [%] |
dialysis_lengh_in_m |
Duration of dialysis session [min] |
uf_was_stopped_counter |
How often was Ultrafiltration Rate set to zero during this dialysis session. |
blood_flow_was_stopped_counter |
How often was blood_flow set to zero during this dialysis session. |
is_hypotension_nadir_lt_90 |
If sbp_systolic_blood_pressure was at least once lower than 90mmHg during the session the entry is marked as true. |
is_hypotension_drop_ge_20 |
If sbp_systolic_blood_pressure was at least once lower than 90mmHg during the session the entry is marked as true. |
number_of_bp_measurements |
Total number of blood pressure measurements |
age_at_treatment |
Calculated from “Year of dialysis session” – “year of birth” |
years_since_first_treatment |
Calculated from “Year of dialysis session” – “year of first dialysis” |
weightstart |
Patient’s weight at the beginning of the session |
dryweight |
Target weight of the session |
weightend |
Patient’s weight at the end of the session |
diff_to_dry_start |
difference between dryweight (target weight) and weightstart (weight before dialysis) |
diff_to_dry_end |
difference between dryweight (target weight) and weightend (weight after dialysis) |
weight_loss |
difference between weightstart (weight before dialysis) and weightend (weight after dialysis) |
body_temperature |
Patients’s temperature |
treatment_id |
Treatment ID |
| Column | Description |
|---|---|
patient_id |
Patient ID |
birthday |
Birthday |
first_dialysis |
Date of first dialysis |
age_at_first_dialysis |
Calculated from “Year of first dialysis” – “year of birth” |
has_diabetes |
Boolean indicating if a patient has diabetes. |
gender |
Gender oft he patient |
num_treatments |
How many treatments do we have in the dataset for this specific patient |
num_hypotension_nadir_lt_90 |
Shows how many treatments of this patient have at least one hypotension defined by a systolic blood pressure less than 90 mmHg. |
num_hypotension_drop_ge_20 |
Shows how many treatments of this patient have at least one hypotension defined by a drop of systolic blood presser greater or equal than 20 mmHg. |
has_timeseries_in_small_subset |
Boolean indicating if this patient ID is present in the timeseries data |