Table 2.

Risk factors for injury per patients

Population	Size, n	Injured, n	Mean risk (CI)	Relative risk (CI)	P-value
Total	459	56	0.12 (0.10–0.15)
Sex
Male	181	15	0.08 (0.05–0.13)
Female	278	41	0.15 (0.11–0.19)	1.78 (1.02–3.12)	0.044
Age
<Median	214	28	0.13 (0.09–0.18)
>Median	245	28	0.11 (0.08–0.16)	0.87 (0.54–1.43)	0.32
Population type
Bifascicular block	115	9	0.08 (0.04–0.14)
Vasovagal	344	47	0.14 (0.10–0.18)	1.59 (0.81–3.14)	0.089
Prior year, n
<Median	239	15	0.06 (0.04–0.10)
>Median	220	41	0.19 (0.14–0.24)	2.97 (1.69–5.21)	<0.0001
Prodrome
Absent	61	15	0.25 (0.15–0.37)
Present	28	11	0.39 (0.24–0.58)	1.60 (0.85–3.02)	0.075
Drug therapy
Placebo	172	24	0.14 (0.10–0.20)
Active	172	23	0.13 (0.09–0.19)	0.96 (0.56–1.63)	0.88

The mean age in the total study population was 45 and the median number of faints in the year before randomization was 3. Prodromal symptoms were recorded in POST 3 and 4. The bifascicular heart block population was in POST 3 and the vasovagal population was in POST 2 and 4.

CI, confidence interval.