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Table 1 Study characteristics of 49 studies measuring HRQL in patients with a TBI

From: Health-related quality of life after TBI: a systematic review of study design, instruments, measurement properties, and outcome

Study characteristics Studies (n)
Number of HRQL instruments  
1 instrument 39
2 instruments 7
> = 3 instruments 3
Number of assessment time points  
1 time point 30
2 time points 9
> = 3 time points 10
Patient sample size  
0-50 11
50-100 13
100-200 13
200-300 5
300-500 4
500+ 3
Patient population: age  
Child studies 10
Adult studies (15+ years) 39
Assessment time points  
Pre-injury 5
Baseline 8
3-4 weeks 22
3 months 10
6 months 9
1 year 18
1-3 years 7
3-5 years 11
5-10 years 5
>10 years 5
Proxy report 1  
Yes 20
No 15
n.a. 14
  1. 1Whether a study used a proxy report instead of or besides patient reports.
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