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ืจืžื•ืช ื”ื”ื•ื›ื—ื” ื‘ืžื—ืงืจื™ื ืžื“ืขื™ื™ื: ืžื”ืŸ? ื•ื›ื™ืฆื“ ื”ืŸ ืงืฉื•ืจื•ืช ืœื›ืชื™ื‘ืช ืžืืžืจื™ื?


ื”ื”ื™ืจืจื›ื™ื” ืฉืœ ืจืื™ื•ืช ืžื“ืขื™ื•ืช ื”ื™ื ืžื•ืฉื’ ืžืชื—ื•ื ื”ืจืคื•ืื”-ืžื‘ื•ืกืกืช-ื”ืจืื™ื•ืช. ืจื•ื‘ ื”ืจื•ืคืื™ื ืฉื•ืืคื™ื ืœื”ืฆื™ืข ื˜ื™ืคื•ืœ ืืฉืจ ืžืขื•ื’ืŸ ื‘ืจืื™ื•ืช ืžื“ืขื™ื•ืช. ืื•ืœื, ื‘ืขื•ื“ ืฉืžื—ืงืจื™ื ืืงืจืื™ื™ื ื•ืžื‘ื•ืงืจื™ื (randomized controlled trials, RCTs) ื”ื ื”ืจืžื” ื”ื’ื‘ื•ื”ื” ื‘ื™ื•ืชืจ ืฉืœ ื”ื•ื›ื—ืช ื™ืขื™ืœื•ืชื• ืฉืœ ื˜ื™ืคื•ืœ ืจืคื•ืื™, ื”ื“ื™ืจื•ื’ ื”ืžื“ืขื™ ื”ื™ื—ืกื™ ืฉืœ ืกื•ื’ื™ื ืื—ืจื™ื ืฉืœ ืžื—ืงืจื™ื ื”ื•ื ืคื—ื•ืช ื‘ืจื•ืจ. ื”ื—ืœ ืžืฉื ืช 1980, ื•ืขื“ื•ืช ืฉื•ื ื•ืช ื‘ืจื—ื‘ื™ ื”ืขื•ืœื ื™ืฆืจื• ื“ื™ืจื•ื’ื™ื ืฉืœ ืกื•ื’ื™ ืžื—ืงืจื™ื ื”ืžืฉืžืฉื™ื ื›ื‘ืกื™ืก ืœื”ื ื—ื™ื•ืช ื•ืชืงื ื•ืช ืžืงืฆื•ืขื™ื•ืช, ื”ื“ื™ืจื•ื’ื™ื ืื™ื ื ื–ื”ื™ื, ืื‘ืœ ื”ื”ื‘ื“ืœื™ื ื”ื ืงื˜ื ื™ื ืžืื•ื“.

ืžืขืจื›ืช ื”ื“ื™ืจื•ื’ ืฉืœ ืจืžื•ืช ื”ื”ื•ื›ื—ื” ื”ื ืžืฆืืช ื‘ืฉื™ืžื•ืฉ ื”ืจื—ื‘ ื‘ื™ื•ืชืจ ื”ื™ื ื–ื• ืฉืœ ืžืจื›ื– ืื•ืงืกืคื•ืจื“ ืœืจืคื•ืื” ืžื‘ื•ืกืกืช-ืจืื™ื•ืช. ืื™ื’ื•ื“ ื”ืจืคื•ืื” ื”ืืžืจื™ืงืื™ ืžืฆื™ืข ื•ืจื™ืืฆื™ื” ืขืœ ื”ื“ื™ืจื•ื’ ืฉืœ ืื•ืงืกืคื•ืจื“ื“ ื•ื’ืจืกื” ืคืฉื•ื˜ื” ื™ื•ืชืจ ืžืกื•ืคืงืช ืขืœ ื™ื“ื™ ืžื—ืœืงืช ื”ื‘ืจื™ืื•ืช ืฉืœ ืžืžืฉืœืช ืื•ืกื˜ืจืœื™ื” ื‘ืชืจืฉื™ื ื–ื”.

RCT ืžื”ื•ื•ื” ืกื˜ื ื“ืจื˜ ืžืงื•ื‘ืœ ืขื‘ื•ืจ ืจืคื•ืื” ืžื‘ื•ืกืกืช-ืจืื™ื•ืช. ื”ืžืฉืชืชืคื™ื ื‘ืžื—ืงืจื™ื ื›ืืœื” ืžื’ื•ื™ืกื™ื ื›ื“ื™ ืœื”ืฉื™ื’ ืžื“ื’ื ื”ื•ืžื•ื’ื ื™ ื‘ื™ื—ืก ืœืžืฉืชื ื™ื ืžื•ื’ื“ืจื™ื ืžืจืืฉ, ื•ืžื—ื•ืœืงื™ื ื‘ืื•ืคืŸ ืืงืจืื™ ืœืงื‘ืœืช ื”ื˜ื™ืคื•ืœ ื”ื ื‘ื“ืง ื‘ื ื™ืกื•ื™, ื˜ื™ืคื•ืœ ื‘ืงืจื” ืื• ืคืœืฆื‘ื•. ื‘ืขื™ืฆื•ื‘ ืฉืœ ืžื—ืงืจื™ื ืžืกื•ื’ ื–ื” ืžืฉื•ืœื‘ื™ื ื”ื™ื‘ื˜ื™ื ืื—ืจื™ื ืฉืžื˜ืจืชื ืœื”ืคื—ื™ืช ื”ื˜ื™ื”, ื›ื•ืœืœ ืžื™ืกื•ืš ื”ื˜ื™ืคื•ืœ ืžืŸ ื”ื—ื•ืงืจ, ืžืŸ ื”ืžืฉืชืชืฃ ืื• ืžืฉื ื™ื”ื.

ืจืžื” ื’ื‘ื•ื”ื” ืืฃ ื™ื•ืชืจ ืฉืœ ืจืื™ื•ืช, ื”ื™ื ืžืกืคืจ RCTs ืฉื‘ื“ืงื• ืฉืืœื” ืจืคื•ืื™ืช ื“ื•ืžื”, ืขื•ืฆื‘ื• ื‘ืื•ืคืŸ ื“ื•ืžื” ื•ื’ื™ื™ืกื• ืื•ื›ืœื•ืกื™ื•ืช ื“ื•ืžื•ืช. ืกืงื™ืจื” ืฉื™ื˜ืชื™ืช ืฉืœ ืงื‘ื•ืฆืช ืžื—ืงืจื™ื ื›ืืœื”, ื™ื›ื•ืœื” ืœืขื ื•ืช ืขืœ ื”ืฉืืœื” ืื ืชื•ืฆืื” ืžืกื•ื™ืžืช ื”ื™ื ื—ื–ืงื” ืžืกืคื™ืง ืื• ืื ื”ื™ืชื” ื™ื™ื—ื•ื“ื™ืช ืœืžื—ืงืจ ืกืคืฆื™ืคื™ ื•ืœื ืฉื•ื—ื–ืจื” ื‘ืžื—ืงืจื™ื ืื—ืจื™ื. ืกืงื™ืจื•ืช Cochrane ื”ืŸ ื“ื•ื’ืžื ื˜ื•ื‘ื” ืžืื•ื“ ืœืกืงื™ืจื•ืช ืฉื™ื˜ืชื™ื•ืชืช ืžื“ื•ืงื“ืงื•ืช ื•ืงืคื“ื ื™ื•ืช.

ืœืคื™ื›ืš, ื”ืจืžื” ื”ืขืœื™ื•ื ื” ืฉืœ ืจืื™ื•ืช ืžื“ืขื™ื•ืช ื”ื™ื ื”ืกืงื™ืจื” ื”ืฉื™ื˜ืชื™ืช. ืชืช-ืกื•ื’ ืฉืœ ื”ืกืงื™ืจื” ื”ืฉื™ื˜ืชื™ืช ื”ื™ื ื”ืžื˜ื”-ืื ืœื™ื–ื”, ืฉื™ื›ื•ืœื” ืœืกืคืง ืชื•ืฆืื” ื›ืžื•ืชื™ืช ืฉืœ ืฉื™ืœื•ื‘ ืฉืœ ืžื—ืงืจื™ื.

ื‘ืจืžื” ื ืžื•ื›ื” ื™ื•ืชืจ ื‘ื”ื™ืจืจื›ื™ื” ื ืžืฆืื™ื ืžื—ืงืจื™ ืขื•ืงื‘ื”, ื”ืžื”ื•ื•ื™ื ืฉื™ืขื•ืจ ื ื™ื›ืจ ืžื›ืœืœ ื”ืžื—ืงืจื™ื ื”ื ืขืจื›ื™ื ืขืœ ื™ื“ื™ ืื ืฉื™ ืžืงืฆื•ืข ืฆืขื™ืจื™ื ื‘ืชื—ื•ืžื™ื ืจืคื•ืื™ื™ื. ืืœื” ื”ื ืžื—ืงืจื™ื ื‘ื”ื ืžืชื‘ืฆืข ืžืขืงื‘ ืื—ืจื™ ืื•ื›ืœื•ืกื™ื•ืช ืžื•ื’ื“ืจื•ืช ืžืจืืฉ ืœืื•ืจืš ื–ืžืŸ ืชื•ืš ื ื™ืกื™ื•ืŸ ืœืžืฆื•ื ืคืจืžื˜

ืจื™ื ืžืกื•ื™ืžื™ื ืฉืœื”ื ื”ืชืืžื” ืขื ืชื•ืฆืื” ืžืกื•ื™ื™ืžืช. ืขืœ ืคื™ ืจื•ื‘, ืžื—ืงืจื™ื ื›ืืœื” ื ืขืจื›ื™ื ื‘ื“ื™ืขื‘ื“, ืขืœ ื™ื“ื™ ื ื™ืชื•ื— ืจืฉื•ืžื•ืช ืจืคื•ืื™ื•ืช ื•ืžืกื“ื™ ื ืชื•ื ื™ื ื”ืžื›ื™ืœื™ื ื ืชื•ื ื™ื ืฉื ืืกืคื• ื‘ืžืกื’ืจืช ื”ื˜ื™ืคื•ืœ ื”ืฉื™ื’ืจืชื™. ื‘ื”ื™ื ืชืŸ ื’ื™ืฉื” ืœืžืกื“ ื”ื ืชื•ื ื™ื ื”ื ื›ื•ืŸ, ืœืžื—ืงืจื™ื ื›ืืœื” ื™ืฉ ืืช ื”ื™ืชืจื•ืŸ ืฉืœ ื›ืžื•ืช ื’ื“ื•ืœื” ืžืื•ื“ ืฉืœ ื ืชื•ื ื™ื ืฉื ืืกืคื• ืขืœ ืคื ื™ ืฉื ื™ื ืฉืœ ืžืขืงื‘. ืขื ื–ืืช, ืžื—ืงืจื™ ืขื•ืงื‘ื” ื™ื›ื•ืœื™ื ื’ื ืœื”ืชื ื”ืœ ื‘ืื•ืคืŸ ืคืจื•ืกืคืงื˜ื™ื‘ื™, ื•ืœืืกื•ืฃ ื›ืžื•ื™ื•ืช ืงื˜ื ื•ืช ื™ื•ืชืจ ืฉืœ ื ืชื•ื ื™ื, ืืš ืขื ื”ื™ืชืจื•ืŸ ื”ืžื•ื‘ื”ืง ื›ื™ ื”ื ืชื•ื ื™ื ื‘ืžื—ืงืจ ื›ื–ื” ื ืืกืคื™ื ื‘ืžืจื•ื•ื—ื™ื ืžื•ื’ื“ืจื™ื ืžืจืืฉ ื•ื‘ืื•ืคืŸ ืื—ื™ื“. ืžื—ืงืจื™ ืกื“ืจื•ืช-ืžืงืจื™ื ื”ืžืขื•ืฆื‘ื™ื ื•ืžื‘ื•ืงืจื™ื ื›ื™ืื•ืช, ื‘ืžื™ื•ื—ื“ ืืœื• ืขื ืžื“ื’ื ื’ื“ื•ืœ ื™ื—ืกื™ืช, ืฉื‘ื• ืœื›ืœ ืžืงืจื” (ื—ื•ืœื”) ื™ืฉ ืžืงืจื” ื‘ืงืจื” ืื—ื“ ืื• ื™ื•ืชืจ, ื ื—ืฉื‘ื™ื ื›ืจืžื” ื“ื•ืžื” ืฉืœ ืจืื™ื” ืžื“ืขื™ืช ืœืžื—ืงืจื™ ืขื•ืงื‘ื”.

ืื—ืจื•ื ื™ื ื‘ื”ื™ืจืจื›ื™ื” ืืš ืขื“ื™ื™ืŸ ื—ืฉื•ื‘ื™ื ื”ื ื”ื ื™ืกื™ื•ืŸ ื”ืงืœื™ื ื™ ื•ื—ื•ื•ืช ื”ื“ืขืช ืฉืœ ืžื•ืžื—ื™ื, ื•ื›ืŸ ื ืชื•ื ื™ื ืฉืื™ื ื ืงืœื™ื ื™ื™ื (ื ืชื•ื ื™ ืžื—ืงืจ in vitro ื•ืžื—ืงืจื™ื ื‘ื‘ืขืœื™ ื—ื™ื™ื).

ื‘ืขืช ื›ืชื™ื‘ืช ืžืืžืจ, ื—ืฉื•ื‘ ืœื”ื‘ื™ืŸ ืืช ื”ื”ื‘ื—ื ื•ืช ื”ืืœื”, ื‘ืขื™ืงืจ ื‘ื›ืชื™ื‘ืช ืคืจืง ื”ืžื‘ื•ื, ื›ื“ื™ ืœื“ืขืช ืื™ืœื• ืžืžืฆืื™ื ืงื•ื“ืžื™ื ืžื”ื•ื•ื™ื ื‘ืกื™ืก ื—ื–ืง ืžืกืคื™ืง ืขื‘ื•ืจ ื”ืžื—ืงืจ ื”ื ื•ื›ื—ื™. ื”ื™ืจืจื›ื™ื” ื–ื• ืฆืจื™ื›ื” ืœื”ื™ืœืงื— ื‘ื—ืฉื‘ื•ืŸ ื’ื ื‘ืขืช ื›ืชื™ื‘ืช ืคืจืง ื”ื“ื™ื•ืŸ, ื›ืืฉืจ ืžืฉื•ื•ื™ื ืืช ื”ืชื•ืฆืื•ืช ื”ื ื•ื›ื—ื™ื•ืช ืœืื™ืœื• ืฉืœ ืื—ืจื™ื ื‘ืื•ืชื• ืชื—ื•ื ื”ืžื—ืงืจ.

ื”ืคื•ืกื˜ ื”ื‘ื ื™ืชืžืงื“ ื‘ื‘ื™ืงื•ืจื•ืช Cochrane.


ืคื•ืกื˜ื™ื ืฉืื•ืœื™ ื™ืขื ื™ื™ื ื• ืื•ืชืš 
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