Table 2.

Relationships of trial conditions with responses.

Response	Number of responses	Prop. of responses (%)	Lead contact	Voltage	Frequency	Diagnosis	Patient
Numbness	146	66.7	0.197	0.015*	0.702	0.848	<0.0001***
Changes in heart rate	79	36.1	0.635	0.071	<0.0001***	<0.0001***	<0.0001***
Pain	37a	16.9	0.573	0.425	0.454	<0.0001***	<0.0001***
Dizziness	35	16	0.002**	0.001**	0.003**	0.447	0.001**
Eye closure	24b	11	0.595	0.335	0.157	0.058	<0.0001***
Giddiness	18	8.2	0.036*	<0.0001***	<0.0001***	0.001**	<0.0001***
Involuntary movements	18c	8.2	0.008**	0.534	0.553	0.001**	<0.0001***

Responses that occurred in <5% of the trials or in only one patient were omitted. Prop, proportion.

^*p < 0.05;

^**p < 0.01;

^***p < 0.001.

The total number of trials was 219.

^a36 reported in a patient with schizophrenia;

^b15 reported in another patient with schizophrenia;

^c12 reported in a patient with bipolar disorder.