Table 2.

Mean Score of Anxiety Caused by Bone Marrow Biopsy in Control and Intervention Groups

Comparison	Control group (n = 40) Mean ± standard deviation	Intervention groups (n = 40) Mean ± standard deviation	Independent t-test		Analysis of covariance
			MD (95% CI)	P-value	MD (95% CI)	P-value
Anxiety score	6/3 ±1/92	3/75± 1/05	-2/55 (-3/24-1/85)	P<0.001	-2/58 (-3/30-1/87)	P<0.001

Covariance analysis of confounding variables such as age, sex, physician experience, biopsy history and biopsy location