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. Author manuscript; available in PMC: 2009 Sep 14.
Published in final edited form as: Brain Stimul. 2008 Apr 1;1(2):71–83. doi: 10.1016/j.brs.2008.03.001

Figure 2.

Figure 2

Seizure Threshold at the Start of ECT. An analysis of covariance was conducted on log-transformed (base10) seizure threshold values, with pulse width and electrode placement conditions and their interaction as between-subject terms and age as a covariate. Seizure threshold was approximately three times higher in patients treated with a brief pulse compared to an ultrabrief pulse stimulus (P<0.001, F = 85.8, df = 1, 85). Seizure threshold was approximately two times higher in patients treated with bilateral compared to right unilateral ECT (P<0.001, F = 32.5, df = 1, 85). The relationship between age and seizure threshold was marginal (P=0.073, F = 3.3, df = 1, 85).