Table 5. Frequencies and percentages of different neuropathic symptoms according to smoking status.

All variables were tested to chi-square test.

Parameter		Not a smoker (n=143)		Former smoker (n=19)		Current smoker (n=20)
Do you experience a deep, aching, tightness, boring, pulling, or squeezing pain in your feet or legs?	Never or occasional	57	40.1%	13	68.4%	12	60.0%
	Occasional but abnormal	28	19.7%	3	15.8%	6	30.0%
	Often	20	14.1%	2	10.5%	2	10.0%
	Almost continuous	37	26.1%	1	5.3%	0	0.0%
Do you experience unusual sensitivity or tenderness when your feet are touched or are used in activities such as walking?	Never or occasional	56	39.2%	16	84.2%	16	80.0%
	Occasional but abnormal	31	21.7%	3	15.8%	3	15.0%
	Often	14	9.8%	0	0.0%	1	5.0%
	Almost continuous	42	29.4%	0	0.0%	0	0.0%
Do you experience burning pain in your feet or legs?	Never or occasional	61	42.7%	15	78.9%	12	60.0%
	Occasional but abnormal	32	22.4%	2	10.5%	4	20.0%
	Often	22	15.4%	1	5.3%	4	20.0%
	Almost continuous	28	19.6%	1	5.3%	0	0.0%
Do you experience sharp, stabbing, or shooting pain, electrical shock-like pain, or surges of pain that last seconds to minutes in your feet or legs?	Never or occasional	75	52.4%	13	68.4%	19	95.0%
	Occasional but abnormal	33	23.1%	3	15.8%	0	0.0%
	Often	20	14.0%	3	15.8%	1	5.0%
	Almost continuous	15	10.5%	0	0.0%	0	0.0%
Do you experience numbness, lost sensation, or a 'dead feeling' like an anesthetic, without prickling in your feet or legs?	Never or occasional	62	43.4%	17	89.5%	12	60.0%
	Occasional but abnormal	42	29.4%	1	5.3%	3	15.0%
	Often	18	12.6%	1	5.3%	5	25.0%
	Almost continuous	21	14.7%	0	0.0%	0	0.0%
Do you experience a prickling or tingling feeling, with or without an 'asleep' feeling, in your feet or legs?	Never or occasional	29	20.4%	4	21.1%	2	10.0%
	Occasional but abnormal	53	37.3%	9	47.4%	11	55.0%
	Often	25	17.6%	5	26.3%	5	25.0%
	Almost continuous	35	24.6%	1	5.3%	2	10.0%