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Table 3.

Radiation therapy and saliva mtDNA change: log (post) − log (pre)

mtDNA	Radiation	n	Mean (SD)	95% CI	Min	Max	P
Cox I	No	28	0.1 (1.17)	−0.35 to 0.56	−2.76	2.21
Cox I		Yes	47	−0.41 (0.8)	−0.64 to −0.17	−2.62	1.17	0.03
Cox II	No	28	−0.01 (1.15)	−0.46 to 0.43	−2.99	2.17
Cox II		Yes	47	−0.51 (0.93)	−0.78 to −0.24	−3.04	2.04	0.05

mtDNA	Radiation	n	Mean (SD)	95% CI	Min	Max	P
Cox I	No	28	0.1 (1.17)	−0.35 to 0.56	−2.76	2.21
Cox I		Yes	47	−0.41 (0.8)	−0.64 to −0.17	−2.62	1.17	0.03
Cox II	No	28	−0.01 (1.15)	−0.46 to 0.43	−2.99	2.17
Cox II		Yes	47	−0.51 (0.93)	−0.78 to −0.24	−3.04	2.04	0.05

NOTE: P values from regression analysis comparing means.