The Feasibility of Text Messaging to Assess Secondhand Smoke Exposure Among Youngsters With Cancer or Sickle Cell Disease

Inclusion Criteria:

* Child Participant:

  * St. Jude Children's Research Hospital (SJCRH) patient with primary diagnosis of any type of cancer or any sickle cell disease genotype (HbSS, HbSC, HbSβ°thal, HbSβ+thal, HbSD, HbSO, Hb S/HPFH, HbSE).
  * 10 to \< 18 years of age at the time of enrollment.
  * For cancer patients, at least one month from diagnosis and in active treatment section at the time of enrollment.
  * Lives in a smoking household defined as at least one adult (\> 18 years) smoker who resides in the home. Smoking adults will be defined as those who have smoked at least one cigarette in the past 30 days, per parent report.
  * Does not currently use tobacco (defined as abstinence from tobacco during the 30 days preceding the screening assessment as based on patient and/or parent report).
  * Able to demonstrate satisfactory texting skills via mobile phone as determined by study research staff.
  * Cannot have significant cognitive or learning impairment that precludes completion of study measures.
  * Reads and speaks English.
  * Willing and able to provide assent according to institutional guidelines.
* Parent Participant:

  * Parent of SJCRH patient who meets criteria as stated above.
  * Reads and speaks English.
  * Willing and able to provide informed consent according to institutional guidelines.

Exclusion Criteria:

* Child Participant:

  * Patients diagnosed with cancer who have relapsed or have recurrence of disease within the past month or those with progressive disease.
  * Patients in medical crisis as determined by consultation with their primary care physician.
  * On bone marrow transplant service.
  * On inpatient service or expected/scheduled inpatient admission (e.g. hospitalized).
  * Acute complications of sickle cell disease requiring hospitalization or an acute care visit including pain crises, acute chest syndrome, acute cerebrovascular events/stroke or active infection/fever.
  * Patient is residing in St. Jude long-term nonsmoking housing facility (e.g. Target House or Ronald McDonald House) during the 7-day texting data collection phase.
* Parent participant:

  * Cannot be in crisis or distress or have another disabling condition that would preclude participation as determined by review of patient's medical record prior to study enrollment.