Reference value and annual trend of white blood cell counts among adult Japanese population

Table 1 Basic parameters

Year of study	No. of cases	Age (years)			White blood cell counts (cells/mm³)
Group by smoking	No. of cases	AM	ASD	p	AM	ASD	2.5 percentile	5.0 percentile	95.0 percentile	97.5 percentile	p
2002
Total	103,492	43.0	12.0		6,248	1,751	2,325	2,815	9,681	10,171
Never smokers	34,298	42.5	12.3		5,609	1,373	2,534	2,918	8,299	8,684
Former smokers	12,665	47.9	11.7	^a	5,713	1,384	2,613	3,001	8,424	8,812	^a
Current smokers	56,529	42.2	11.7	^a,b	6,756	1,864	2,581	3,103	10,409	10,931	^a,b
2010
Total	130,431	44.2	11.7		6,162	1,719	2,311	2,793	9,531	10,012
Never smokers	40,748	41.2	11.6		5,666	1,412	2,503	2,899	8,434	8,829
Former smokers	36,041	48.3	11.1	^a	5,750	1,441	2,522	2,925	8,575	8,979	^a
Current smokers	53,642	43.7	11.5	^a,b	6,815	1,884	2,596	3,123	10,507	11,034	^a,b

ISSN: 1347-4715