This non-interventional, prospective study will characterize the impact of three approved first and second generation BCR-ABL1 tyrosine kinase inhibitors on cardiovascular and metabolic risk factors in chronic phase CML (CP-CML) patients who are TKI naive and initiating first-line TKIs in routine clinical practice in the US. All treatment decisions will be determined at the discretion of the treating physician(s) and data identifying the cardiovascular and metabolic risk factors will be collected. Additional fasting blood samples (collected following 8 hours of fasting) will be collected during standard of care (SOC)/routine office visits. Additional research imaging will be performed and will be reviewed by core imaging laboratory. As the study is collecting data on management of CML, this study will not influence the prescribing or management practices at participating sites.

This non-interventional, prospective study will characterize the impact of three approved first and second generation BCR-ABL1 tyrosine kinase inhibitors on cardiovascular and metabolic risk factors in chronic phase CML (CP-CML) patients who are TKI naive and initiating first-line TKIs in routine clinical practice in the US. All treatment decisions will be determined at the discretion of the treating physician(s) and data identifying the cardiovascular and metabolic risk factors will be collected. Additional fasting blood samples (collected following 8 hours of fasting) will be collected during standard of care (SOC)/routine office visits. Additional research imaging will be performed and will be reviewed by core imaging laboratory. As the study is collecting data on management of CML, this study will not influence the prescribing or management practices at participating sites.

Inclusion Criteria:

1. ≥ 18 years at the time of Ph+ CP-CML diagnosis
2. Newly diagnosed chronic phase of Ph+ CP-CML, confirmed with cytogenetic and/or molecular testing at baseline
3. Treatment-naïve and initiating treatment with dasatinib, imatinib, nilotinib or bosutinib
4. Willingness and ability to comply with routine office visits

Exclusion Criteria:

1. Any other prior or active non-CML active malignancy for which the patient is receiving treatment
2. Participation in a therapeutic clinical trial for CML disease

Newly-diagnosed, treatment-naïve CP-CML patients who are ≥ 18 years at the time of CP-CML diagnosis who are scheduled to initiate treatment with dasatinib, imatinib, nilotinib or Bosutinib are eligible for enrollment. Enrolled patients (n=200) will be distributed across the 3 patient treatment groups of newly diagnosed CP-CML patients who will initiate their first- line TKI treatment