Until now, there have been no studies verifying whether nursing care hours obtained from hospital data sources can be collected reliably.
Information on the exposures of interest, average railway and traffic noise during day (0600 hr to 2200 hours) and night (2200 hr to 0600 hours), was obtained from SONBASE, the national databank on noise pollution in Switzerland, developed by the FOEN (BAFU 2009a, 2009b).
Summarized mixing heights by season and hour were obtained from the 1997 Southern California Ozone Study (Croes and Fujita 2003) and assigned to each modeled day based on season and hour.
Sixty-two 24-hours serum profiles (6 samples/24 hours) were obtained from 44 healthy boys (ages; 7.2 18.6 years) during their pubertal development, classified into five stages: prepuberty (testis, 1 2 mL), early (testis, 3 6 mL), mid (testis, 8 12 mL), late-1 (testis,15 25 mL, not reached final height) and late-2 (testis,15 25 mL, reached final height).
Radiation data, geographic latitude, altitude, vapor pressure, and sunshine hours were obtained from the China National Meteorological Information Center.
The information on weekly working hours was obtained from the WSWT unless the worker considered the surveyed week to be unusual, in which case their hours derived from a direct question (How many hours do you work per week?), asked of those whose employment contract specified the number of working hours.
The three 24-hour-samples obtained from each individual cat during this period were pooled.
Intern self-reported data on continuous work hours were obtained from the residency program.
In the 1991 study [ 40], two one-hour protocols obtained from the same patient with different therapist were analyzed by this procedure.
Demographic, clinical, imaging, and analytical parameters (at admission, 24, 48, and 72 hours) were obtained from the hospital clinical reports and recorded, at discharge, in a database.
