[A prospective, randomized, double-blinded control study on comparison of tramadol, clonidine and dexmedetomidine for post spinal anesthesia shivering].

The level for all analyses was set at p = 0.05 with a p -value less than 0.05 were considered statistically significant and p -value less than 0.01 were considered extremely significant.

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The p -value was <0.0001 which was highly significant by One way Analysis of variance (ANOVA) test.

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