Number of cases with ultrasound findings other than cysts and nodules.

<p>A parenthesis indicates percentage in participants of the age category.</p

Location of Aomori Prefecture, Yamanashi Prefecture, Nagasaki Prefecture and Fukushima Prefecture.

<p>Location of Aomori Prefecture, Yamanashi Prefecture, Nagasaki Prefecture and Fukushima Prefecture.</p

Number of cases with thyroid cysts and nodules in the three examination areas.

<p>Data are expressed as a case number/a number of participants. A parenthesis indicates percentage in total participants. Forty-three participants had both cyst and nodule.</p

Characteristics of participants in the three examination areas.

<p>Characteristics of participants in the three examination areas.</p

Age-adjusted prevalence of thyroid cysts and nodules.

<p>The estimated prevalence is age-adjusted to the 2010 Japan standard population.</p><p>CI indicates confidence interval.</p

Number of cases with thyroid cysts and nodules according to age and the effect of age on their prevalence.

<p>A parenthesis indicates percentage in participants of the age category.</p><p>OR indicates odds ratio per 1 year adjusted by gender and the examination areas.</p><p>CI indicates confidence interval.</p