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. Author manuscript; available in PMC: 2010 Nov 1.

Published in final edited form as: Psychophysiology. 2009 Jul 6;46(6):1130–1136. doi: 10.1111/j.1469-8986.2009.00859.x

Table 2.

Demographic data for good and poor heartbeat detectors.

	Good heartbeat detectors	Poor heartbeat detectors
Visit 1
Number (%)	26 (44%)	33 (56%)
Sex	12 M: 14 F	11 M: 22 F
Age (Mean +/− SD)^a	42.0 +/− 12.2	53.5 +/− 7.2
BMI (Mean +/− SD)^b	23.7 +/− 4.8	25.4 +/− 6.1
Visit 2
Number (%)	23 (39%)	36 (61%)
Sex	10 M: 13 F	13 M: 23 F
Age (Mean +/− SD)^c	43.5 +/− 12.3	51.5 +/− 9.4
BMI (Mean +/− SD)^d	24.3 +/− 4.6	24.9 +/− 6.1

^a

t₅₇ = 4.51, p < .00003;

^b

t₅₇= 1.15, p < .14;

^c

t₅₇ = 2.82, p < .004;

^d

t₅₇ = .40, p < .36.