CPAP is the gold standard therapy for Obstructive Sleep Apnea. It consists of a machine that delivers a constant and steady air pressure through a mask worn over the nose or both nose and mouth during sleep. This continuous flow of air helps to keep the airway open, preventing episodes of airway collapse and obstruction characteristic of OSA. CPAP therapy is highly effective in reducing symptoms such as snoring, daytime sleepiness, and fatigue, as well as improving overall sleep quality and decreasing the risk of complications associated with untreated OSA, such as cardiovascular issues. It is considered the gold standard treatment for moderate to severe OSA and is often prescribed after a sleep study confirms the diagnosis. CPAP machines come in various designs and features to suit individual needs and preferences, and proper adjustment and compliance are essential for optimal treatment outcomes.

It is a self-administered questionnaire consisting of nine items rated on a scale of 0-10. The first five items assess cognitive perceptions such as the impact on life (item 1); duration of illness (item 2); disease control (item 3); beliefs about treatment effectiveness (item 4); and symptom experience (item 5). Items 6 and 8 assess emotional aspects, such as concern about the illness and mood. Item 7 assesses the level of understanding of the illness. The last item requires respondents to rank the three factors that caused the illness. Cut-offs for the total score are determined as follows: <42 indicates a mild threat, 42-49 indicates a moderate threat, and ≥50 indicates a high threat.

CPAP therapy average daily adherence will be evaluated through data extraction from the integrated ventilator software during hospital visits.

A self-administered questionnaire consisting of 32 items divided into 4 subscales: "Consensus on important issues," "Satisfaction with relationship status," "Doing things together," and "Satisfaction with emotional and sexual life." To obtain the interpretation of the questionnaire, the average score for each area is calculated, noting that in the responses to questions 30 and 31, the corresponding score is 0 for NO and 1 for YES.

It is a self-administered questionnaire, consisting of two subscales of 18 items each, which assess Avoidance and Anxiety related to attachment in relationships with romantic partners. The items are rated on a 7-point Likert scale (1=strongly disagree; 7=strongly agree), with higher scores indicating greater attachment avoidance and anxious attachment with romantic partners.