OBJECTIVE: This investigation evaluated the relationship between changes in thyroid indices and mood stability during lithium and carbamazepine prophylaxis for bipolar disorder. METHOD: In the first 2 years, 30 patients with bipolar mood disorder were randomly assigned to 1 year of lithium and then 1 year of carbamazepine, or vice versa; in the third year, they received lithium plus carbamazepine. By stepwise regression analysis, the degree and timing of lithium- and carbamazepine-induced thyroid changes and their subsequent relationship to long-term mood stability were evaluated. RESULTS: During the lithium phase, there was a significant inverse relationship between morbidity and mean serum level of free T4, i.e., a lower mean serum level of free T4 was associated with more affective episodes and greater severity of depression as shown by the Beck Depression Inventory. During the carbamazepine phase, there was an inverse relationship between mean level of total T4 and global severity rating. During the combination phase, no relationships between thyroid indices and clinical outcome were significant. CONCLUSIONS: In the lithium phase, a low level of free T4 was associated with more affective episodes and greater severity of depression. Whether this mood instability is causally related to low free T4 levels and whether it can be attenuated with T4 replacement remain to be studied in a controlled setting.
RCT Entities:
OBJECTIVE: This investigation evaluated the relationship between changes in thyroid indices and mood stability during lithium and carbamazepine prophylaxis for bipolar disorder. METHOD: In the first 2 years, 30 patients with bipolar mood disorder were randomly assigned to 1 year of lithium and then 1 year of carbamazepine, or vice versa; in the third year, they received lithium plus carbamazepine. By stepwise regression analysis, the degree and timing of lithium- and carbamazepine-induced thyroid changes and their subsequent relationship to long-term mood stability were evaluated. RESULTS: During the lithium phase, there was a significant inverse relationship between morbidity and mean serum level of free T4, i.e., a lower mean serum level of free T4 was associated with more affective episodes and greater severity of depression as shown by the Beck Depression Inventory. During the carbamazepine phase, there was an inverse relationship between mean level of total T4 and global severity rating. During the combination phase, no relationships between thyroid indices and clinical outcome were significant. CONCLUSIONS: In the lithium phase, a low level of free T4 was associated with more affective episodes and greater severity of depression. Whether this mood instability is causally related to low free T4 levels and whether it can be attenuated with T4 replacement remain to be studied in a controlled setting.
Authors: Lakshmi N Yatham; Sidney H Kennedy; Sagar V Parikh; Ayal Schaffer; David J Bond; Benicio N Frey; Verinder Sharma; Benjamin I Goldstein; Soham Rej; Serge Beaulieu; Martin Alda; Glenda MacQueen; Roumen V Milev; Arun Ravindran; Claire O'Donovan; Diane McIntosh; Raymond W Lam; Gustavo Vazquez; Flavio Kapczinski; Roger S McIntyre; Jan Kozicky; Shigenobu Kanba; Beny Lafer; Trisha Suppes; Joseph R Calabrese; Eduard Vieta; Gin Malhi; Robert M Post; Michael Berk Journal: Bipolar Disord Date: 2018-03-14 Impact factor: 6.744
Authors: Brian J Mickey; Yarden Ginsburg; Adam F Sitzmann; Clara Grayhack; Srijan Sen; Clemens Kirschbaum; Daniel F Maixner; James L Abelson Journal: J Psychiatr Res Date: 2018-05-16 Impact factor: 4.791