또한, 대학생, 청소년과 같이 부모의 영향력이 점차 감소하고 또래집단의 영향력이 확대될 때 친구 관계는 삶의 질과 더욱 밀접해 졌다.
In addition, when the influence of parents gradually decreased and the influence of peer groups increased, such as college students and adolescents, the friendship became more closely related to the quality of life.