"variable mood" is a correct phrase and can be used in written English.
It is typically used in grammar and linguistics to describe the grammatical feature of a verb that indicates the speaker's or writer's attitude or feelings towards the action or state expressed by the verb. It can also refer to the changes in a person's mood over time. Example: The poem's shifting themes and variable mood reflect the author's inner turmoil and conflicting emotions.
Her turnout on any given day is an extension of her highly variable moods.
Viv is of highly variable moods, and may or may not mean what she says.
ED was associated with more severe and variable moods and more frequent depression.
Uncontrolled pain, pain treatment and "interference of pain with mood" have been suggested as being associated with insomnia [ 11- 13], as well as low or variable moods, dreams, concerns, hopelessness, post-traumatic experience, anxiety and depression [ 4, 11, 13- 16].
The effects of the tester, particularly where tests are not computer-administered, may be important, not only because of different interactions with different subjects but also because of the examiner's variable moods, motivation, levels of fatigue, and tendency to introduce systematic errors into the testing procedure.
Second, it overcomes the problem of incomparable coefficients in models with different independent variables (Mood 2010).
Chi square analyses and one-way analyses of variance (ANOVAs) confirmed that the groups were matched on demographic characteristics, diagnostic status, intrusive memory variables, mood and anxiety (Fs < 1, p's > .05) (see Table 2 for demographics).
The aim of the present study was to find variables (mood and related parameters, cognitive performance, physiological parameters) that are easily measured and sensitive to mild dehydration under standard and well-controlled conditions.
Our study has some limitations, including: a small sample size because of the study population coming from a single center; presence of potential confounding variables (mood disorders, BMI, medications, body image, socioeconomic/education status); and limited generalizability, given that patients were recruited from one clinic and that there were many exclusion criteria.
The variable 'perceived mood in the family' [ 33] was measured by the question 'How do you consider the mood in your family?' with a 5-grade ordinal scale.
