highly significantp < 0.001
Age contributed significantly to FA variance in both clusters, as expected given that it is well known to correlate with FA ( Sullivan & Pfefferbaum, 2006 ), but the contribution of diagnosis remained highly significant as an explanatory factor of FA variance after controlling for age (for the ‘SZ < Control’ cluster: F = 26.99, df = 2, p < 0.001; for the ‘BD < Control’ cluster: F = 28.51, df = 2, p < 0.001).