Table 2.

Underlying heart disease, disease manifestations and electrocardiographic indications for pacing in each study group

	Study groups		P
	Active (n = 184)	Control (n = 195)
Underlying heart disease
Primary conduction system disease	31.1	25.9	0.21
None known	39.9	46.3	0.2
Hypertensive	7.3	9	0.54
Ischaemic	6.7	4.5	0.33
Cardiomyopathy	3.6	5	0.51
Congenital	1.6	0	0.07
Disease manifestations
None	14.5	9.4	0.1
Syncope	44.5	38.2	0.18
Light-headedness	2.5	6.4	0.06
Dyspnoea	15	18	0.4
Fatigue	18	16.3	0.64
Palpitation	2.5	6	0.07
Others	3	5.6	0.19
Electrocardiographic indications
Bradycardia–tachycardia or sick sinus syndrome	28.3	32.5	0.37
First- or second-degree atrioventricular block	31.6	24.5	0.12
Third-degree atrioventricular block	25.1	26	0.84
Missing information	2.7	4	0.47
Others	12.3	13	0.83

Values indicate percentage of patients in the corresponding group.