Table 6. Selection of NMSS items by stepwise logistic regression¹ to discriminate between PD patients (n = 200) and HFS patients (n = 75).

Selected NMSS items in the order selected	Chi-Square Score	p-value	Cumulative area under the ROC curve	Odds Ratio	95% Wald Confidence Intervals	Wald p-value
Presence of ‘constipation’	37.2	< 0.0001	0.672	37.0	[6.80, 200]	< 0.0001
NMSS score for ‘restless legs’	10.8	0.001	0.726	2.10	[1.41, 3.13]	0.001
NMSS score for ‘altered interest in sex’	10.6	0.001	0.789	1.68	[1.15, 2.46]	0.007
Presence of ‘difficulty falling or staying asleep’	8.5	0.004	0.811	0.15	[0.06, 0.36]	<0.0001
Presence of ‘weight change’	9.8	0.002	0.829	17.5	[2.45, 125]	0.004
NMSS score for ‘pain’	7.9	0.005	0.850	1.24	[1.09, 1.43]	0.002
Presence of ‘forget to do things’	6.4	0.011	0.864	0.39	[0.19, 0.80]	0.011
NMSS score for ‘dribbling saliva’	6.3	0.012	0.877	2.06	[1.24, 3.42]	0.005
Presence of ‘altered sense of taste or smell’	5.7	0.017	0.887	9.09	[1.77, 45.5]	0.008
NMSS score for ‘difficulty experiencing pleasure’	4.8	0.029	0.894	1.26	[1.05, 1.52]	0.012
Presence of ‘feel nervous’	5.2	0.023	0.8972	0.35	[0.14, 0.88]	0.025

¹Significance level to enter  =  level to stay  = 0.05.

²Final model AUC  = 0.897.