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Table 1 Population characteristics of cases and controls*

From: Short communication: genetic variations of SLC2A9 in relation to Parkinson’s disease

  Control (%) Case (%)
N 911 788
Gender   
Men 725 (79.58) 606 (76.90)
Women 186 (20.42) 182 (23.10)
Age at baseline, years 63.5 ± 4.8 63.0 ± 5.0
Smoking status   
Never 318 (34.91) 363 (46.07)
Former 540 (59.28) 391 (49.62)
Current 49 (5.38) 23 (2.92)
Caffeine intake, mg/day 364.91 ± 362.26 295.54 ± 334.69
Age at onset, year   65.73 ± 7.43
Age at diagnosis, year   66.65 ± 7.37
  1. * Numbers may not add up to total due to missing.