Study limitations include lack of double-blinding or placebo control and failure to establish the optimal doses of magnesium sulfate and nifedipine. 研究局限包括缺乏雙盲或安慰劑對照，沒(méi)有確定硫酸鎂及硝苯地平的最佳劑量。
In the magnesium sulfate group, mild and seere maternal aderse effects were significantly more frequent than in the nifedipine group. 在硫酸鎂治療組，產(chǎn)婦輕度與重度副作用明顯多于硝苯吡啶治療組。
