Table 2

Dynamic measurement of key variables for the Ningbo Schizophrenia Cohort follow-up

Type of information	Variables	Baseline	Follow-up
Sociodemographics	Sex, age, ethnicity, occupation, education years, marital status, economic status, type of health insurance and residence	*
Pre-existing mental disorders	Diagnosis of other mental disorders	*
Pre-existing mental disorders	Previous forms of psychiatric treatment	*
Risk factors for schizophrenia	Familial psychiatry history	*
	Childhood trauma	*
	Socioeconomic status	*
	Season of birth	*
	Urbanicity	*
	Green spaces	*
	Air pollutants	*
	Body mass index	*	*
Lifestyle factors	Smoking	*
	Alcohol consumption	*
	Physical activity	*
Psychological status	Suicidal intent	*
	History of suicide attempts	*
	Positive and Negative Syndrome Scale	*
	Brief Psychiatric Rating Scale	*
	Duration of untreated psychosis	*
Symptoms and severity	Age of first psychiatric hospitalisation	*
	Mode of onset	*
	Clinical Global Impression	*
	Global Assessment Scale	*
	Social Disability Screening Schedule	*	*
	Number of psychiatric outpatient visits	*	*
	Risk assessment	*	*
	Number of psychiatric admissions and length of stay	*	*
	Date of last psychiatric discharge	*	*
	Nurses’ Observation Scale for Inpatient Evaluation	*†	*†
Psychotropic medication	Time to first antipsychotic medication	*	*
	Duration of medication	*
	Drug name	*
	Dose	*
	Chlorpromazine equivalent		*
	Defined daily dose51		*
	Adherence to medication		*
	Adverse drug reactions		*
Death	Cause and date of death		*
Medical condition	Other comorbidities (eg, cardiovascular disease, gastrointestinal system disease, endocrine system disease and neurological system disease)	*	*
Medical condition	Medication	*	*
Ancillary tests	Laboratory tests	*	*
Ancillary tests	Imaging studies (eg, CT and MRI)	*	*
Health economics	Outpatient costs	*	*
	Prescription costs	*	*
	Hospitalisation costs	*	*†

*Variables were collected at this stage.
†Variables were measured at hospitalisation.