Table 2

 Characteristics of the cases with dementia and control subjects

CharacteristicDementia (total)ADVDUnclear, if AD or VDOther dementiaControl subjects (total)Population controlsAmbulatory dementia-free patients
n%n%n%n%n%n%n%n%
AD, Alzheimer’s disease; VD, vascular dementia.
Age at symptom onset
    <70 years2512.81211.1915.3416.05724.91814.83936.4
    ⩾70, <75 years2713.854.61322.0936.04318.81613.12725.2
    ⩾75, <80 years2814.81614.8711.91416.04620.12318.92321.5
    ⩾80, <85 years5829.73633.31728.81416.05925.84536.91413.1
    ⩾85, <90 years4221.52926.91016.9312.0229.62016.421.9
    ⩾90 years157.7109.335.1114.020.921.9
    Mean79.580.978.086.376.075.478.172.3
Sex
    Male4422.61715.72237.3520.07532.84032.83532.7
    Female15177.49184.33762.732080.015467.28267.27267.3
Living arrangement
    Living at home11860.56762.03762.71456.021995.612098.49992.5
    Old people’s home7739.54138.02237.331144.0104.421.687.5
Informant
    Index person himself3719.02220.4813.6728.022296.911594.3107100.0
    Spouse/partner4221.61816.71932.2520.020.921.6
    Child7840.04642.61932.221144.052.254.1
    Other3819.52220.41322.0128.0
Region
    Frankfurt, districts with ⩾35% blue collar workers2010.3109.346.81520.0104.477.532.8
    Frankfurt, districts with ⩾28–<35% blue collar workers5729.22926.92033.9832.09039.36150.02927.1
    Frankfurt, districts with <28% blue collar workers9247.25248.12847.521040.07834.13629.54239.3
    Offenbach31.535.1
    Bad Homburg105.165.623.428.04218.31814.82422.4
    Darmstadt136.71110.223.493.998.4
    Unknown
Family history of dementia (first degree)
    No15579.58780.64678.012184.019786.09577.910295.3
    Yes2814.41816.7711.9312.073.143.332.8
    Unknown126.232.8610.2214.02510.92318.921.9
Smoking history
    Never smoked11860.57266.72745.821768.012755.56654.16157.0
    Ever smoked7437.93431.53152.51832.010043.75444.34643.0
    Unknown31.521.911.720.921.6
    Never smoked11860.57266.72745.821768.012755.56654.16157.0
    >0, ⩽10 pack-years2211.31110.2711.91312.03314.41915.61413.1
    >10, ⩽25 pack-years115.698.323.42812.21713.91110.3
    >25, ⩽50 pack-years136.765.6711.92410.51310.71110.3
    >50 pack-years147.232.8711.9416.093.910.887.5
    Ever smoked, pack-years unknown147.254.6813.614.062.643.321.9
    Unknown smoking status31.521.911.720.921.6
Educational level
    Elementary level/no graduation14775.48275.94372.931976.012454.15444.37065.4
    Secondary school level3216.41816.7915.3520.05825.33226.22624.3
    Graduated from high school126.287.435.114.02410.51411.5109.3
Psychosocial network at age 30
    Poor psychosocial ties and poor social activities9950.86358.32440.711144.07331.93932.03431.8
    Moderate psychosocial ties and/or moderate social act.3819.51614.81830.5416.04821.02419.72422.4
    High psychosocial ties or high social act.4824.62422.21423.72832.08235.84436.13835.5
    High psychosocial ties and high social act.42.121.928.0229.6119.01110.3