Table 2: Weighted kappa coefficients for ordinally scaled items.

Item Directly observable Did you experience difficulties …? Weighted kappa
[95% CI] 		Item Directly observable Did you experience difficulties …? Weighted kappa
[95% CI]
4 ‘in general’ 0.59 [0.44-0.74] 5.12 ‘remembering newly-learned names’ 0.25 [0.10-0.41]
5.1 X ‘taking responsibility for a household’ 0.69 [0.54-0.83] 5.13 ‘learning new information’ 0.49 [0.33-0.66]
5.2 ‘living alone’ 0.73 [0.34-1.00]* 5.14 X ‘managing your
own money’		 0.77 [0.64-0.92]
5.3 X ‘doing the shopping’ 0.82 [0.69-0.94] 5.15 X ‘spending money in
a balanced way’		 0.76 [0.63-0.90]
5.4 X ‘taking care of yourself (physical aspects, hygiene)’ 0.85 [0.73-0.97] 5.16 ‘maintaining a friendship or friendships’ 0.48 [0.29-0.67]**
5.5 X ‘holding down
a paid job’		 0.82 [0.66-0.98] 5.17 ‘participating in
social activities’		 0.52 [0.35-0.69]
5.6 X ‘accomplishing tasks as quickly as necessary’ 0.65 [0.50-0.81] 5.18 X ‘having good relationships with people close to you’ 0.66 [0.52-0.80]
5.7 ‘working in the field you were educated‘ 0.66 [0.45-0.87] 5.19 X ‘living together
with your family’		 0.72 [0.59-0.85]
5.8 ‘earning a sufficient wage’ 0.88 [0.75-1.00]** 5.20 ‘having an emotionally satisfactory relationship’ 0.57 [0.42-0.72]
5.9 ‘managing the expected work load’ 0.58 [0.43-0.74] 5.21 ‘being able to defend your interests’ 0.51 [0.34-0.68]
5.10 ‘concentrating on a book or film’ 0.49 [0.33-0.66] 5.22 X ‘doing exercise or participating in sport’ 0.45 [0.27-0.62]
5.11 ‘while making mental calculations’ 0.53 [0.37-0.69] 5.23 ‘having hobbies or personal interests’ 0.62 [0.46-0.78]

For the unmarked items, all 4 categories were used by the raters. One item marked * had only two used categories (unweighted kappa was calculated). Items marked ** had 3 used categories. The weight matrices changed with the number of used categories (see Table 3A and B). The item numbers in the table refer to the German scale (see supplementary files 2 and 3). Regarding item 5.1 to item 5.11, the order of items is identical to the original English version of the scale (see supplementary file 1, e.g. item 1 in the original scale became item 5.1 in the German scale). Since item 12 of the original English scale is not present in the self-administered German version, the number of the items 5.12 to 5.23 of the German scale is one point lower than the corresponding item in the original English scale (e.g. item 13 of the English scale corresponds to item 5.12 in the self-administered German scale).