Table 2. Pair-wise item level correlations of observers' and patients' views.

SDM issue	SDM-Q item number	OPTION item number	Spearman's rho	p-value
opportunity to ask questions	2	9	−.04	.77
consideration of pros and cons	6	5	−.06	.62
follow up arrangement	10 / 11	12	.06 / .04	.63 / .79

Item pairs with identical semantic were selected.