CST participants also exhibited greater improvements in somatic QoL ( p = .042 ) , including greater improvements in pulmonary QoL ( d = 0.13 [ 95 % CI = 0.01-0 .24 ] ) , less fatigue ( d = 0.34 [ 95 % CI = 0.18-0 .50 ] ) , and less shortness of breath ( d = 0.11 [ 95 % CI = -0.01 to 0.23 ] ) and greater improvement in distance walked on the Six-Minute Walk test ( d = 0.09 [ 95 % CI = 0.01-0 .16 ] ) .