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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Heart Lung. 2011 Jul 27;41(1):44–56. doi: 10.1016/j.hrtlng.2011.05.003

TABLE 4. Correlation Matrix, Means, and SDs for Study Day 0a (N = 97).

constrict smother tight work hunger effort suffocate
smother .726
tight .841 .626
work .670 .839 .639
hunger .671 .720 .711 .726
effort .665 .819 .595 .792 .691
suffocate .603 .743 .521 .701 .707 .642

Mean 5.59 5.57 5.15 6.53 5.91 6.70 5.17
SD 3.86 4.04 3.87 3.26 3.87 3.18 4.29
a

Study Day 0 = day admitted to hospital (recall rating).

P < .001 for all correlation coefficients