Objective: To investigate the incidence and homotypic and heterotypic continuity of psychiatric disorders between ages 6 and 11. Methods: In 2004, all live births in the city of Pelotas, Brazil, were recorded (n=4,231). Psychiatric disorders were assessed by the Strengths and Difficulties Questionnaire (SDQ). SDQ subscale scores (emotional symptoms, conduct problems, hyperactivity/inattention, and peer relationship problems) were categorized as normal or abnormal. To examine associations between problems over time, odds ratios were computed using logistic regression. Results: Any SDQ difficulty was observed in 350 children (10.4%, 95%CI 9.4-11.5) at age 6 and 476 (14.2%, 95%CI 13.0-15.4) at age 11, with a higher prevalence among boys at both ages. Between ages 6 and 11, there was a 50 and a 45% increase in the prevalence of emotional and hyperactivity/inattention symptoms, respectively. Among those who had any SDQ difficulty at age 6, that status persisted in 81% at age 11. We found homotypic continuity of emotional symptoms, conduct problems, hyperactivity/inattention, and peer relationship problems. Conclusions: Our results indicate an increasing incidence of psychiatric disorders in this age group, with rates of disorders and continuity patterns similar to those observed in other studies.

中文翻译：

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2004 年 Pelotas 出生队列中 6 至 11 岁精神疾病的连续性

目的：调查 6 至 11 岁精神障碍的发病率和同型和异型的连续性。方法：2004 年，巴西佩洛塔斯市的所有活产婴儿都被记录下来（n=4,231）。通过优势和困难问卷 (SDQ) 评估精神疾病。SDQ 分量表分数（情绪症状、行为问题、多动/注意力不集中和同伴关系问题）被归类为正常或异常。为了检查问题之间随时间的关联，使用逻辑回归计算优势比。结果：在 6 岁的 350 名儿童（10.4%，95%CI 9.4-11.5）和 11 岁的 476 名儿童（14.2%，95%CI 13.0-15.4）中观察到任何 SDQ 困难，两个年龄段的男孩患病率均较高. 在 6 到 11 岁之间，情绪和多动/注意力不集中症状的患病率分别增加了 50% 和 45%。在 6 岁时有任何 SDQ 困难的人中，这种状态在 11 岁时持续了 81%。我们发现情绪症状、行为问题、多动/注意力不集中和同伴关系问题的同型连续性。结论：我们的结果表明，该年龄组精神疾病的发病率不断增加，其疾病发生率和连续性模式与其他研究中观察到的相似。