Table 1.

Maximum plasma creatinine concentration and blood leucocyte count in current smokers and in non-smokers (ex-smokers and never-smokers)

	Current smokers		n	Non-smokers		n	P
	Median	Range		Median	Range
All patients			183			174
Plasma creatinine max. (μmol/L)	273	51–1645		184	52–1537		<0.001
Blood leucocyte count max (×109/L)	10.8	4.1–44.7		8.9	3.8–50.3		<0.001
Males			147			110
Plasma creatinine max. (μmol/L)	292	71–1645		191	67–1537		0.005
Blood leucocyte count max (×109/L)	11.0	5.4–44.7		9.2	3.8–50.3		0.005
Females			36			64
Plasma creatinine max (μmol/L)	227	51–1156		175	52–959		0.529
Blood leucocyte count max (×109/L)	9.7	4.1–43.3		8.6	4.2–31.2		0.030

Differences between genders are also shown. Values are expressed as median and ranges.