Relationship between plasma risperidone concentrations and clinical features in chronic schizophrenic patients in China

Table 1 Characteristics of sociodemographic and clinical variables

Characteristic (n = 50)	Minimum value	Maximum value	Mean value	SD
Age (yr)	38	69	58.38	8.31
BMI	16.02	36.05	23.95	4.82
Course of illness (yr)	15	51	33.32	9.18
Systolic blood pressure (mmHg)	90	180	130.08	18.21
Diastolic blood pressure (mmHg)	60	105	78.60	10.32
Heart rate (per min)	60	103	79.86	9.79
QTc	0.38	0.52	0.45	0.03
Mean PANSS positive subscale score	7	20	10.92	3.17
Mean PANSS negative subscale score	9	31	22.32	4.20
Mean PANSS general psychopathology subscale score	22	51	31.04	5.07
Mean PANSS total score	48	101	64.28	8.89
PHQ-9	0	9	1.82	1.64

BMI: Body mass index; QTc: QT interval; PANSS: Positive and Negative Syndrome Scale; PHQ-9: Patient Health Questionnaire Depression Scale.