Qualitative Characteristics of Depression in Parkinson’s Patients and Controls

Table 1

Group characteristics—clinical and demographic.

	HC	DC	PD patients	value
				Chi-square/Kruskal-Wallis
Male	141 (50%)	122 (48.2%)	68 (63.6%)	0.009
Female	141 (50%)	131 (51.8%)	39 (36.4%)
Age	64 ± 7 (95% CI 62.77–64.43)	67 ± 7 (95% CI 65.96–67.72)	67 ± 10 (95% CI 64.89–68.75)	<0.001
BDI available	232 (82%)	179 (71%)	66 (62%)
BDI < 9	152	89	38	0.016
%°	65.5	49.7	57.6
95% CI	59.4–71.6%	42.4–57.0%	45.7–69.5%
BDI 9–12	32	34	7
%°	13.8	19.0	10.6
95% CI	9.4–18.2%	13.3–24.8%	3.1–18.0%
BDI 13–17	23	23	13
%°	9.9	12.9	19.7
95% CI	6.1–13.7%	8.0–17.8%	10.1–29.3%
BDI ≥ 18	25	33	8
%°	10.8	18.4	2.1
95% CI	6.8–14.8%	2.7–24.0%	4.2–20.0%
MMSE	28 ± 2 (95% CI 28.07–28.43)	27 ± 2 (95% CI 27.09–27.65)	27 ± 2 (95% CI 26.73–27.63)	<0.001

Kruskal-Wallis test for continuous data.
°Percentage of BDI data available over groups.
CI: confidence interval.