Characteristics of hospital differences in missing of clinical laboratory test results in a multi-hospital observational database contributing to MID-NET® in Japan

Table 1 Frequency of laboratory result records and missing proportions in the overall cohort

Scenario no	Target laboratory test	Most frequent number of records	Percentage of patients with multiple records (%)	Missing proportion (%)
Scenario no	Target laboratory test	Period 1	Period 1	Period 1	Period 2
1	Blood glucose	1	68.8	12.8	9.9
1	HbA1c	0	24.5	43.9	37.8
2	ALT	1	47.4	8.6	5.6
	AST	1	47.3	8.7	5.7
	ALP	1	31.6	29.2	24.8
	Bilirubin	1	38.5	20.0	16.2
	LDL-chol	1	27.6	27.0	23.1
	TG	1	30.9	20.0	16.5
3	Serum uric acid	1	49.2	13.2	10.6
3	Serum creatinine	1	61.0	5.4	3.6
4	Serum sodium	1	46.0	25.9	20.6
4	Serum creatinine	1	48.1	22.4	16.6
5	Blood glucose	1	59.2	4.0	2.7
	HbA1c	1	42.1	11.1	8.5
	Serum amylase	0	33.9	36.3	31.7
6	INR	2	70.2	9.7	5.7
7	Blood glucose	1	63.0	13.8	11.2

HbA1c hemoglobin A1c, ALT alanine transaminase, AST aspartate aminotransferase, ALP alkaline phosphatase, LDL-chol low-density lipoprotein cholesterol, TG triglyceride, INR international normalized ratio. Period 1 was 90 days before the first prescription date. Period 2 was 180 days before the first prescription date

ISSN: 1472-6947