Table 1. The 30 most frequently collected serum biochemistry measures, by number of unique participants.

The description of each measure, local code, Read Code, total number of records, number of unique participants and unique participants with genotype data are shown. Totals are for data collected from 2006 to 2016 on participants aged 18 or over.

Description	Local code	Read Code	Total records	Unique IDs	Unique IDs with Genotype
Creatinine	CR	44J3.	206498	17393	16069
Sodium	NA	44I5.	205738	17387	16056
Urea	UREA	44J9.	193348	17355	16038
Potassium	KA	44I4.	201746	17315	15995
eGFR	eGFR	451E.	195396	17101	15885
Glucose	GL	44g..	89325	16604	15424
Alkaline phosphatase	AP	44F..	224274	15564	14148
Bilirubin	BI	44EC.	148662	15220	14088
Albumin	AL	44M4.	225920	15163	14107
Total Cholesterol	CHO	44P..	72951	15106	14187
HDL Cholesterol	HDL	44P5.	68357	14748	13855
ALT/SGPT	ALT	44G3.	136145	13545	12541
TSH	TSH	44TW.	60750	13166	12203
C-Reactive Protein	CRP	44CS.	81382	11807	10938
Corrected calcium	CC	44IC.	47913	11642	10767
Calcium	CA	44I8.	67949	11631	10757
Triglycerides	TRIG	44Q..	34374	8373	7769
Gamma-Glutamyltransferase	GT	44G9.	38172	7351	6715
Free Thyroxine	FT4	442V.	26892	7272	6693
Protein (Total)	TP	44M3.	39303	6925	6341
Chloride	PCL	44I6.	80031	6749	6191
Phosphate	PH	44I9.	33796	6360	5825
Bicarbonate	BIC	44I7.	23877	4197	3843
Creatine kinase	CK	44HG.	10614	3907	3623
Magnesium	MG	44LD.	18331	3794	3470
Amylase	AMY	44CN.	8856	3498	3222
Urate	URIC	44K5.	6688	3002	2780
LDL Cholesterol (calc)	CLDL	44PI.	15269	3223	2968
FSH	FSH	443h.	4272	2766	2580
Transferrin	TRF	44CB.	6255	2734	2507