We found co-occurrence of migraine, bilateral headache and low age to be associated with increased pericranial tenderness in CTTH.
Furthermore, MRR for each age group was always higher for males, with male/female rate ratios (Fig. 3) increasing from 1.52 in the lowest age category to 4.03 in the 35 44 year age group, then decreasing to 1.66 in the 65 74 year age group, and finally increasing again to 2.59 in the oldest group.
The prevalence was significantly higher in females than males (19.1% vs. 14.4%; Pearson's chi-square test; p = 0.007), and increased markedly with age (Pearson's chi-square test; p < 0.001), from 11% in the lowest age group to 39% in the highest (Table 1).
Furthermore, F was reduced to 0.43 and 0.66 for females and males, respectively, at the lowest ages compared to the plateau value set to 1 at highest age in males.
This did not change when only subjects with significant Rayleigh tests were included, or when the lowest age quartile was compared to highest (data not shown).
It was noticed that the mean score for QOL was the least for the lowest age category, it increased to the highest in the primary school age category, then during the adolescence (> 12 years) it worsens again.
First, for some years, the lowest age group covers ages 0 to 24 (1969-2003) or 0 to 29 (1934).
Although the numerical number of deaths is moderate, the low age contributes to a relative high YLL.
This observation corroborates published epidemiological reports indicating that this infection spreads at a high rate in low age groups to reach 50% of young adolescents by age 15, and continues at a lower rate throughout adult life to reach most of the elderly [ 25, 26].
Compared to the lowest age group 50 59, the oldest males and females (80 and above) had about 9 and 10 times higher odds of reporting far-sightedness.
