Based on information about the frequency of drinking in the last 12 months, participants were categorised as: less than monthly, from once a month up to 4 times a week, almost every day or every day.
They were categorised as endangered in 2008 as their numbers plummeted by 50% in 24 years.
Asbestos exposure was further assessed by frequency of exposure, defined as the percentage of working time exposed (categorised as 1 5, 5 30 or >30%), and intensity of exposure (categorised as low, medium or high).
A summary of the isolated pathogens was presented as frequencies and categorised as viral, bacterial or mixed viral bacterial infections.
18 Frequency was categorised as: (1) not at all, (2) once a month, (3) once a week, (4) 2–3 times a week, (5) 4–6 times a week and (6) daily.
* Intake frequency was categorised as follows: less than monthly, < once per month; monthly, once per month to once per week; weekly or more, ≥ once per week.
* Intake frequency was categorised as follows: less than monthly, < once per month; monthly, once per month to once per week; weekly or more, ≥ once per week; daily, ≥ once per day.
"There are several that I would categorise as entrepreneurial.
Alcohol consumption estimated from the food frequency questionnaire was categorised as <1, 1-7, 8-15, and ≥16 g/day.
Time-frequency decompositions of IBI are typically categorised as high frequency (HF) from 0.15 to 0.4 Hz, low frequency (LF) from 0.04 to 0.15 Hz, and very low frequency (vLF) from 0.003 to 0.04 Hz28.
