ABSTRACT: OBJECTIVE:How family environment and parental factors affect health status and symptoms in childhood cancer survivors is understudied. We examined the influence of family cohesion, parent distress, and overprotection on child symptom burden and health-related quality of life (HRQOL) and family strain in survivors of childhood acute lymphoblastic leukemia. METHODS:Parents of 213 children treated with chemotherapy only completed a survey when survivors were at least 5-year postdiagnosis. Family Environment Scale, Brief Symptom Inventory-18, Parent Protection Scale, Pediatric Quality of Life Inventory, and Impact on Family were used to assess family cohesion, parental distress, overprotection, child symptom burden and HRQOL, and family strain, respectively. Path analysis was conducted to quantify effects of family cohesion on family strain through parental distress, overprotection, child symptoms, and HRQOL. RESULTS:Lower family cohesion (? = 0.06, 95% CI, 0.01-0.13), higher parental distress (? = 0.35, 95% CI, 0.20-0.45), and overprotection (? = 0.17, 95% CI, 0.01-0.32) were associated with more child symptom burden. More symptom burden were associated with poorer child HRQOL (? = 0.66, 95% CI, 0.57-0.75), which in turn was associated with more family strain (? = 0.11, 95% CI, 0.01-0.22). Lower maternal education was associated with overprotection (? = -0.23, 95% CI, -0.33 to -0.12), more child symptoms (? = -0.30, 95% CI, -0.41 to -0.16), poorer child HRQOL (? = -0.36, 95% CI, -0.46 to -0.21), and more family strain (? = -0.15, 95% CI, -0.23 to -0.08). CONCLUSIONS:Family and parental factors contributed to health outcomes of childhood acute lymphoblastic leukemia survivors. Interventions to enhance family cohesion, decrease parental distress and overprotection, and ameliorate child symptoms may improve family functioning.