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集団検診受診者の眼底写真より原発性網膜色素変性(RP)の疫学調査を施行した。対象は96,965名で,男性40,330名,女性56,635名である。年齢は18〜86歳(平均53.3歳)に分布し,このうち40〜60歳代は80,571名(83.1%)であった。対象者は岩手県の全人口1,415,554名の6.8%に相当した。RPは62名に認められ,全受診者に対する有病率は0.064%であった。RPの内訳は男性28名,女性34名で性差はなく,年齢は60歳代に最も多く(27名)認められた。岩手県の地域別の特徴としては,周囲を隔絶された沿岸部の有病率が高かった(p<0.05)。
We tried to detect retinitis pigmentosa (RP) from fundus photographs in subjects who par-ticipated in multiphasic health-check program in Iwate Prefecture. A total of 96,965 persons were tested, an equivalent of 6.8% of the Prefecture. The age ranged from 18 to 86 years, average 53.3 years. A total of 80,571 subjects, 83.1%, belonged to the age range between 40 and 69 years. We identified 62 RP subjects, 28 males and 34 females. The majority belonged to the 7th decade of age. The overall incidence of RP was 0.064% with no sex predilec-tions. The incidence of RP was higher in the coastal area isolated by mountains than in urban or open mountain areas (p<0.05). Multiphasic health-che-ck program was thus useful in the epidemiological survey of retinitis pigmentosa.
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