Table 1 Total number of CpGs per clock and the subset directly overlapping with our sequencing data

From: Epigenetic age predictors for non-invasive assessment of human skin

Clock

Type

Total probes

Probes present

Percent present

PhenoAge

Microarray

513

510

99%

Hannum

Microarray

71

66

93%

Horvath1

Microarray

353

346

98%

Horvath2

Microarray

391

387

99%

BS-Clock

Sequencing

4527

2129

47%

  1. Microarray clocks have a minimum percentage of probe representation of 93%, whilst the Twist panel only has a direct overlap to 47% of the BS-Clock probes.