Patient characteristics were conceptually grouped into predisposing, enabling, and needs factors according to Andersen's Behavioural Model of Health Services Use [ 44].
The predictor variables were conceptually grouped into 4 different broad categories: land use, road and traffic, population and dwellings, and physical geography.
The 33 CSHQ items were conceptually grouped into 8 subscales: bedtime resistance, sleep onset delay, irregular sleep duration, sleep anxiety, night awakening, parasomnias, sleep-disordered breathing, and daytime sleepiness [ 32].
The CPSS includes 14 items and the 14 items are conceptually grouped into 3 domains: mental and emotional condition (5 items), peer acceptance and social function (5 items), and parenthood (4 items).
The twenty-four possible risk factors regarding frequent nocturnal awakening were conceptually grouped into six dimensions: sociodemographic characteristics, biological chronic health problems, psychosocial conditions, sleep environments, sleep hygiene, and family history of insomnia.
The final version of the questionnaire was conceptually grouped into 6 subscales: (1) knowledge on sex/HIV/AIDS (31 items); (2) attitude toward sexual/drug-use behaviors (8 items); (3) attitude toward person with HIV/AIDS (7 items); (4) exposure to sexual/drug-use behaviors (11 items); (5) self-protection efficacy (4 items); and (6) communication about sex/HIV/AIDS issues (4 items).
The 33 sleep-disturbance items are conceptually grouped into eight subscales: bedtime resistance (6 items), sleep-onset delay (1 item), sleep duration (3 items), sleep anxiety (4 items), night wakings (3 items), parasomnias (7 items), sleep-disordered breathing (3 items), and daytime sleepiness (8 items).
During open coding, each transcript was reviewed several times and the data reduced to codes; then codes that were found to be conceptually similar in meaning were grouped into subcategories; in axial coding the aim was to clarify how the subcategories that emerged were related to preliminary categories.
Waterlogging can be conceptually divided into three time stages.
26– 28 Prostate cancer has a prolonged natural history that can be conceptually divided into three stages.
The interface can be conceptually divided into three main components: gene summaries, custom searches and tools.
