Table 3.

Risk of epilepsy and number of acupuncture courses in stroke patients

Number of courses	n	Events	Person-years	Incidence	HR (95% CI)*
0	21 020	1382	120 164	11.5	0.77 (0.66 to 0.90)
2	4385	182	18 258	10.0	1.06 (0.91 to 1.25)
3	2907	164	12 720	12.9	0.84 (0.69 to 1.02)
4	2040	104	9597	10.8	0.75 (0.59 to 0.95)
5	1545	72	7271	9.9	0.74 (0.55 to 0.98)
6	1168	48	5464	8.8	0.64 (0.57 to 0.71)
≥7	8975	423	47 734	8.9	0.69 (0.63 to 0.74)

*Adjusted for age, sex, stroke subtype, low income, urbanisation, hypertension, mental disorder, diabetes, hyperlipidaemia, head injury, Parkinson's disease, Alzheimer's disease, brain cancer, renal dialysis, rehabilitation, anti-epilepsy drugs, anticoagulant, anti-platelet agents, lipid-lowering agents, stay of intensive care unit, neurosurgery and length of hospital stay.