“… 42 , 48 , 49 A considerable number of studies indicate that LCIG positively affects QoL (Table 2 ). 12 , 13 , 14 , 16 , 17 , 37 , 38 , 40 , 50 , 51 , 52 Correlation analyses in one open‐label, observational, prospective study (n = 12; age: 73.8 ± 7.9 years; disease duration: 12.8 ± 5.0 years) did not show significant relationships between clinical conditions and QoL or between levels of anxiety, depression, and burden with caregiver QoL, possibly because of small patient numbers. 50 In a post hoc analysis of the GLORIA registry study (n = 233), moderate positive correlations were found between the NMSS total score and Parkinson's Disease Questionnaire (PDQ)‐8 total score (r = 0.46, P < 0.0001), improvements of the sleep/fatigue domain and PDQ‐8 total score (r = 0.32, P = 0.0001), and the mood/cognition domain and PDQ‐8 total score (r = 0.37, P < 0.0001) during a 2‐year period.…”