• 沒有找到結果。

第五章 討論

第二節 建議

對照組的介入

本研究不屬於隨機化的分組,造成兩組在教育程度上有所差 異,除此之外,在介入前,營養知識、飲食行為和自我效能總分上 也有顯著差異。因此本研究在營養教育的成效評估上,著重各組間 的前後差異值。對照組的部分,因本研究不作任何形式的營養教育 介入,以致有部分的受試者認為無法從飲食營養的教育中獲益,而 降低其參與意願。因此,建議未來在對照組的介入上,可考慮以非 得舒飲食的營養教育介入,如高血壓的生活形態改變,也可藉此 比較兩種高血壓教育的成效差異。或者對照組可提供多次且不涉及 得舒飲食的個人飲食諮詢,如此一來,在不影響受試者的參與意願 前提下,即可進行隨機分組,減少研究上的系統誤差。

得舒飲食對藥物服用與否的降血壓成效

本研究發現:得舒組(n=34)的服藥者(n=20)在介入後其血壓的改 變幅度優於無服藥者(n=14)。但因人數進一步分層,以致人數減少,

可能影響研究效果(effect size)。因此建議在未來的研究上,可針對 服藥者和無服藥者各自分組,並且提高各組的樣本數,即可確認其成 效。

得舒飲食問卷與血壓、題位測量之相關性分析

本研究的介入成效顯示:得舒組(n=34)在介入後,其營養知識、

飲食行為和收縮壓及舒張壓皆有顯著改善。但由相關性結果得知,得 舒組(n=34)營養知識、飲食行為與自我效能與舒張壓呈顯著的負相關 性(-0.29, -0.26, 0.31, p<0.05),但未能與收縮壓呈現顯著的相關性。

推測可能原因是得舒組的樣本數有限,以致於統計分析的相關性 不 易 達 到 。 因 此 建 議 本 研 究 在 未 來 可 擴 大 樣 本 數 , 以 便 進 行 cross-sectional 之調查,確認得舒問卷與血壓之間的相關性。

生活形態調整之納入

本研究在不涉及高血壓的生活形態調整之介入,其得舒組(n=34) 介入後血壓有明顯降低成效。因此未來本研究在發展教學上,可考慮 納入生活形態調整之介入,包括一組以得舒營養教育為主,一組以得 舒營養教育+生活形態調整介入,探討兩組之間在血壓改善成效上是 否不同。

營養素的定量分析

本研究未來擬針對高血壓者進一步探討飲食營養素的定量分 析,以瞭解高血壓者在介入後的三大營養素和得舒營養強調的個別營 養素:鈣、鉀、鎂、膳食纖維的攝取量是否明顯改變。而著眼於本研 究得舒組(n=34)高血壓者的年齡較長,平均年齡:60.35±10.4 歲,

故未來針對受試者之收案條件將界定年齡的範圍:如 30-50 歲的高血 壓成人,以便實施 24 小時回憶法和三天飲食記錄法的飲食評估。

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