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Table I: 
Comparison of apparent diffusion coefficients (ADCs) between patients with and without a history of systemic connective tissue disorders (CTD)
Non-CTD Meana (95% CIb)CTD Mean (95% CI)
Parotid:
 Leftc0.47 (0.42, 0.53)0.98 (0.75, 1.20)
 Rightc0.53 (0.47, 0.59)0.95 (0.73, 1.17)
 Combinedc0.50 (0.44, 0.56)0.96 (0.79, 1.25)
Spinal cord0.98 (0.93, 1.04)1.04 (0.83, 1.25)
  • a ADC values expressed in units of (× 10−3 mm2/sec).
  • b 95% confidence intervals.
  • c ADCs of the parotid glands are statistically significantly different (P <.05) between patients with and without a history of CTD; however, there is no difference in ADCs of the spinal cord.