Cannabis use is linked to symptoms of depression and anxiety, particularly among sexual minorities. This study examines the relationships between cannabis, and depression and anxiety symptoms at 13, 15, and 17 years using cross-lagged models in a predominantly White (n = 1,430; 92%) subsample of 1,548 participants from the Quebec Longitudinal study of Child Development. Multigroup analyses were conducted to examine the models according to sexual orientation. Demographic covariates were included as control variables, as well as alcohol, cigarette, and other drug use to examine cannabis specificity. The full sample revealed small bidirectional associations, which remained significant once control variables were included in the model: cannabis at 13 and 15 years predicted anxiety symptoms at 15 and 17 years respectively, and depression symptoms at 15 years predicted cannabis at 17 years. The initial association between cannabis at 13 years and depression symptoms at 15 years was accounted for by other drug use at 13 years. Substantial differences were found between heterosexual participants and sexual minorities: LGB participants presented a substantially larger positive association between depression symptoms at 15 years and cannabis at 17 years, as well as a negative association between anxiety symptoms at 15 years and cannabis at 17 years. Both of these relationships remained significant when accounting for control variables. These results suggest that the relationships between cannabis, and depression and anxiety symptoms are bidirectional across adolescence, albeit small. Sexual minorities present particularly large associations that may represent self-medication efforts for depressive symptoms between 15 and 17 years. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译：

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异性恋和 LGB 青少年大麻、抑郁和焦虑的纵向关联。

大麻的使用与抑郁和焦虑的症状有关，尤其是在性少数群体中。本研究使用交叉滞后模型，在来自魁北克儿童发展纵向研究的 1,548 名参与者的子样本中，使用交叉滞后模型检查了大麻与 13、15 和 17 岁时的抑郁和焦虑症状之间的关系. 进行了多组分析以根据性取向检查模型。人口统计学协变量作为控制变量，以及酒精、香烟和其他药物使用，以检查大麻的特异性。完整样本揭示了小的双向关联，一旦模型中包含控制变量，这种关联仍然很显着：13 岁和 15 岁的大麻分别预测 15 岁和 17 岁的焦虑症状，15 岁时的抑郁症状预测了 17 岁时的大麻。13 年的大麻与 15 年的抑郁症状之间的最初关联是由 13 年的其他药物使用引起的。异性恋参与者和性少数群体之间存在显着差异：LGB 参与者在 15 年的抑郁症状和 17 年的大麻之间呈现出更大的正相关，以及 15 年的焦虑症状和 17 年的大麻之间的负相关。在考虑控制变量时，这两种关系仍然很重要。这些结果表明，大麻与抑郁和焦虑症状之间的关系在整个青春期是双向的，尽管很小。性少数群体表现出特别大的关联，可能代表 15 至 17 岁之间抑郁症状的自我药物治疗。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。