Survey of Midlife in Japan (MIDJA), April-September 2008

The MIDJA study is a probability sample of Japanese adults (N = 1,027) aged 30 to 79 from the Tokyo metropolitan area. Survey data were collected on sociodemographic characteristics (age, gender, marital status, educational status), psychosocial characteristics (e.g., independence/interdependence, personality traits, sense of control, goal orientations, social support, family obligation, social responsibility), mental health (depression, anxiety, well-being, life satisfaction), and physical health (chronic conditions, health symptoms, functional limitations, health behaviors). These measures parallel those in a national longitudinal sample of midlife Americans known as MIDUS (ICPSR 4652: MIDUS II and ICPSR 2760: MIDUS I). The central objective is to compare the Japanese sample (MIDJA) with the United States sample (MIDUS) to test the hypothesis that the construct of interdependence predicts well-being and health in Japan, whereas the construct of independence predicts well-being and health in the United States. Cultural influences on age differences in health and well-being are also of interest.

MIDJA 研究是一项针对东京都市圈 30 至 79 岁日本成年人的概率抽样调查（样本量 N = 1,027）。调查数据涵盖了社会人口统计学特征（年龄、性别、婚姻状况、教育程度）、心理社会特征（例如，独立性/相互依赖性、人格特质、控制感、目标导向、社会支持、家庭责任、社会责任）、心理健康（抑郁、焦虑、福祉、生活满意度）以及身体健康（慢性疾病、健康症状、功能限制、健康行为）等方面的内容。这些指标与名为 MIDUS（ICPSR 4652：MIDUS II 和 ICPSR 2760：MIDUS I）的美国中年纵向样本中的指标相一致。研究的核心目标是对比日本样本（MIDJA）与美国样本（MIDUS），以验证以下假设：相互依赖性在日本预测福祉和健康，而独立性在美国预测福祉和健康。此外，文化对健康和福祉中年龄差异的影响也引起了研究者的兴趣。