Consultation Patterns among Japanese Cedar Pollinosis Subjects at an Urban Clinic Report 2: a 20-Year Experience (1990-2009) in Chiyoda Ward, Tokyo

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  • 都市部 (東京都) の一診療所におけるスギ花粉症患者の受診動態 (第2報)<br>—千代田区における20年間 (平成2年~21年) の検討—
  • 都市部(東京都)の一診療所におけるスギ花粉症患者の受診動態(第2報)千代田区における20年間(平成2年~21年)の検討
  • トシブ(トウキョウト)ノ イチ シンリョウジョ ニ オケル スギ カフンショウ カンジャ ノ ジュシン ドウタイ(ダイ2ホウ)チヨダク ニ オケル 20ネンカン(ヘイセイ 2ネン~21ネン)ノ ケントウ

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Abstract

To determine the consultation patterns of Japanese cedar pollinosis subjects during the pollen dispersal season, we surveyed those treated at a private clinic in Chiyoda Ward, Tokyo, from 1990 to 2009. We also studied the relationship between subject numbers and pollen count.<br>The above relationship correlated highly with linear regression equation y=0.0897x+627.47 with R2=0.7851 (p< 0.001). The relationship from 1994 to 2009, when the study began in early January, correlated highly with logarithmic regression equation y=257.43Ln(x)-1014.8 with R2=0.9542 (p<0.001). Based on these results, we concluded that estimated pollen count helps predict the year's Japanese cedar pollinosis subject numbers very highly accurately.<br>Numbers of subjects returning did not correlate well with pollen count, and continued to decrease each year. Return visits averaging 2.6 in 1990 gradually decreased to 0.73 in 2006 -a reduction we attributed to long-term medication and the increased self-payment proportion in medical expenditures.

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