The questionnaire consists of 10 items, divided into the following 3 domains: snoring and witnessed apnoeas (5 items), daytime sleepiness (4 items) and high blood pressure/obesity (1 item).
This clinical history questionnaire has recognised efficacy in distinguishing individuals at high risk of OSA, with 10 items organised into 3 categories as follows: snoring and apnea (5 items), daytime sleepiness (4 items), and systemic arterial hypertension and obesity (1 item).
The BQ contains 10 questions covering three categories including: 1) snoring severity (items 1 5), 2) excessive daytime sleepiness (items 6 9), and 3) history of high blood pressure or obesity (item 10).
This variable was created by adding the scores on the 3 items assessing nocturnal insomnia symptoms (score ranging from 0-4: sleep onset problems, sleep maintenance problems, or early morning awakenings) as well as the single daytime tiredness/sleepiness item.
This questionnaire has 10 items organised into three categories, as follows: (1) apnoea and snoring (5 items), (2) daytime sleepiness (4 items); and (3) systemic arterial hypertension and obesity (1 item).
They found that subjective sleep quality was impaired in patients with type 1 diabetes in relation to the sleep disturbance and daytime dysfunction items of the PSQI.
An additional item, daytime sleep, was removed as results could prove difficult to interpret because sleeping either more or less could represent an increase in RSV severity and increased sleep would already be captured within the activity item (i.e., no activity), and decreased sleep could also correlate with mood (e.g., increased fussiness).
Most of the daytime and overnight items contained similar concepts except for a few that were more relevant during the day (e.g., activity).
All the daytime symptom score items in the symptom diary were completed for 140 (90%) of the 155 episodes treated with prednisolone and 136 (89%) of the 153 of the episodes treated with placebo.
10 OAB symptoms were the main exposure and assessed based on the OAB Symptom Score (OABSS), 12 which is designed to quantify OAB symptoms over the previous week based on four items: daytime frequency, night-time frequency, urgency and urgency incontinence (see online supplementary table S1).
