The irregular patterns of sex ratios (Fig. 3) and age ratios (Fig. 4) are indicative of errors of age misreporting, undercounting or overcounting in census data.
They found that in Denmark the following factors were associated with irregular use of dental services: age, sex, exercise habits, costs, dental anxiety, and perceived own dental health.
Mrs. McIntosh saw education in its broadest sense, from conjugating irregular Greek verbs to sex education, as the way to prepare young women for the complicated balancing act she was urging on them.
Irregular use of condom was also categorized as unprotected sex.
When we explored the reason for perceived risk of HIV infection (n = 43), the habit of irregular use of lubricant (25%), irregular use of condom (34.6%), the fear of condom tear (50%), having multiple sex partners (38.5%), and the habit of exchanging needles (7.7%) were mentioned.
A 19-year-old had always had irregular periods and never had sex without a condom.
The majority of respondents practice unsafe sexual behaviors which include irregular condom and lubricant use, frequent and unprotected sex with many sex partners including female partners, and sex in exchange for money.
Overall, a consistent irregular pattern of age ratios and sex ratios in singles years of ages in all four censuses reflects age misreporting often due to understating or overstating of ages.
In addition, an irregular border was also associated with sex (men).
Earlier menarche and irregular periods, among other markers of sex-hormone levels, have been associated with a higher risk of asthma and allergic diseases.
