Final answer:
The factor increasing the index of self-harm during the manic phase of bipolar 1 disorder is impulsive behavior and poor judgment, as this can lead to risky behaviors associated with impaired judgment.
Step-by-step explanation:
The factor that increases the index of self-harm for a patient experiencing the manic phase of bipolar 1 disorder is d) Impulsive behavior and poor judgment. This is because during manic episodes, individuals with bipolar disorder can exhibit elevated mood, expansiveness, or irritability, along with a marked increase in energy and activity levels. These factors can lead to impulsive and risky behaviors as the person may have impaired judgment during this time, which increases the risk of self-harm.
Conversely, options a) Compliance with medication, b) Engaging in regular therapy sessions, and c) Social support from family and friends are factors that can potentially reduce the risk of self-harm by promoting stability, enhancing coping strategies, and providing a support network to help manage symptoms of bipolar 1 disorder.