Table 1.

Characteristics of studies included in meta-analysis

First author, year of publication	Number of sites	Location	Overall number of subjects	Follow-upa	Endpoint adjudication	Randomization scheme
Deisenhofer, 200112	Multicentre	Non-US	92	7.5 months	Central	SC vs. DC devices
Wilkoff, 20026	Multicentre	US	506	8.4 months	Central	SC vs. DC programming
Bansch, 200411	Single centre	Non-US	102	6.1 months	Central	SC vs. DC programming
Friedman, 20068	Multicentre	US and Non-US	400	6 months	Central	SC vs. DC programming
Kolb, 200613	Single centre	Non-US	100	52 months	NR	SC vs. DC devices
Almendral, 20087	Multicentre	Non-US	334	15.7 months	Central	SC vs. DC AND SC vs. DC programming
Kolb, 201418	Multicentre	Non-US	453	23.4 months	Central	SC vs. DC programming
Friedman, 201417	Multicentre	US and Non-US	100	12 months	Central	SC vs. DC devices

^aIn some cases, follow-up was prespecified and in other cases, follow-up is reported as a mean.

DC, dual chamber; Non-US, outside United States; NR, not reported; SC, single chamber; US, United States.