This dataset and its collection methods are described in
The data set is also used in
When referencing this material, please include the standard citation for PhysioNet:
The LTMM database contains 3-day 3D accelerometer recordings of 71 elder community residents, used to study gait, stability, and fall risk.
Subjects
Seventy-one community-living elder adults (mean age = 78.36 ± 4.71 years; range = 65-87 years) were studied. Subjects were included if they were not previously clinically diagnosed with any gait or balance disorders, and if they were cognitively intact, with a Mini-Mental State Examination score above 24 points. Subjects were classified as fallers and nonfallers based on their self-report of previous falls. If subjects had at least 2 falls in the past year, they were considered fallers, otherwise they were considered non-fallers.
Experimental Procedure
The subjects underwent multiple protocols and evaluations:
- Clinical and Traditional Fall Risk Assessment: Functional performance based assessments were performed in the laboratory including the Dynamic Gait Index (DGI), the Berg Balance Scale (BBS), the Timed Up and Go test (TUG), and the Four Square Step Test (FSST). The Mini Mental State Examination (MMSE) and the Activities-specific Balance Confidence scale (ABC) were also performed. The results of these afforementioned tests can be found from column 29 of the
ClinicalDemogData_COFL.xlsx
spreadsheet. - Gait assessment in the Lab: Participants walked for 1 minute at a comfortable, self-selected speed while wearing a gait belt. A 3D accelerometer was worn on the lower back to quantify gait using previously validated methods. The accelerometer files recordings of these tests can be found in the
LabWalks
directory in MIT format. - Three-day Activities of Daily Living Assessment: After performing tests in the laboratory, participants were asked to wear a 3D accelerometer on their lower back for 3 consecutive days (except during activities like showering or swimming). Subjects received a diary for tracking when and why they took off and put on the device, shown in the
ReportHome75h.xlsx
spreadsheet. These are the main recordings of this database and can be found in MIT format below.
Files
- General Information Files
- The
ClinicalDemogData_COFL.xlsx
spreadsheet contains information about the subjects such as their age, gender, and how many times they fell within the last year, and the results of the performed clinical tests. - The
ReportHome75h.xlsx
spreadsheet contains self-reported events by the subjects regarding when and why they put on and removed their accelerometers over their three day recordings.
- The
- High Resolution Accelerometer Recording Files
- The three day 3D accelerometer recordings are in standard MIT format, with each one containing a binary signal (
.dat
) file and a corresponding header (.hea
)file used to interpret the signals. The file names are in the form CO0NN for non-fallers or FO0NN for fallers, where NN is the subject number for that group. - The 1 minute lab walk recordings within the
LabWalks
directory are in the same format as the three day recordings described above. The file names are also in a similar form.
- The three day 3D accelerometer recordings are in standard MIT format, with each one containing a binary signal (
Name Last modified Size DescriptionApache/2.4.25 (Debian) mod_auth_pgsql/2.0.3 mod_auth_tkt/2.1.0 OpenSSL/1.0.2u Server at archive.physionet.org Port 443
Parent Directory - CO001.dat 2016-05-19 11:43 196M digitized signal(s) CO001.hea 2016-06-14 11:11 434 header file CO002.dat 2016-05-19 11:44 309M digitized signal(s) CO002.hea 2016-06-14 11:11 431 header file CO003.dat 2016-05-19 11:44 309M digitized signal(s) CO003.hea 2016-06-14 11:11 437 header file CO004.dat 2016-05-19 11:44 309M digitized signal(s) CO004.hea 2016-06-14 11:11 441 header file CO005.dat 2016-05-19 11:44 298M digitized signal(s) CO005.hea 2016-06-14 11:11 438 header file CO006.dat 2016-05-19 11:44 309M digitized signal(s) CO006.hea 2016-06-14 11:11 437 header file CO007.dat 2016-05-19 11:44 309M digitized signal(s) CO007.hea 2016-06-14 11:11 439 header file CO008.dat 2016-05-19 11:45 309M digitized signal(s) CO008.hea 2016-06-14 11:11 441 header file CO009.dat 2016-05-19 11:45 309M digitized signal(s) CO009.hea 2016-06-14 11:11 437 header file CO010.dat 2016-05-19 11:45 309M digitized signal(s) CO010.hea 2016-06-14 11:11 433 header file CO011.dat 2016-05-19 11:46 271M digitized signal(s) CO011.hea 2016-06-14 11:11 435 header file CO012.dat 2016-05-19 11:46 309M digitized signal(s) CO012.hea 2016-06-14 11:11 439 header file CO013.dat 2016-05-19 11:47 309M digitized signal(s) CO013.hea 2016-06-14 11:11 441 header file CO014.dat 2016-05-19 11:47 235M digitized signal(s) CO014.hea 2016-06-14 11:11 439 header file CO015.dat 2016-05-19 11:48 309M digitized signal(s) CO015.hea 2016-06-14 11:11 441 header file CO016.dat 2016-05-19 11:48 268M digitized signal(s) CO016.hea 2016-06-14 11:11 441 header file CO017.dat 2016-05-19 11:49 309M digitized signal(s) CO017.hea 2016-06-14 11:11 443 header file CO018.dat 2016-05-19 11:49 291M digitized signal(s) CO018.hea 2016-06-14 11:11 440 header file CO019.dat 2016-05-19 11:50 266M digitized signal(s) CO019.hea 2016-06-14 11:11 438 header file CO020.dat 2016-05-19 11:50 309M digitized signal(s) CO020.hea 2016-06-14 11:11 439 header file CO021.dat 2016-05-19 11:51 309M digitized signal(s) CO021.hea 2016-06-14 11:11 443 header file CO022.dat 2016-05-19 11:51 296M digitized signal(s) CO022.hea 2016-06-14 11:11 434 header file CO023.dat 2016-05-19 11:52 305M digitized signal(s) CO023.hea 2016-06-14 11:11 433 header file CO024.dat 2016-05-19 11:52 303M digitized signal(s) CO024.hea 2016-06-14 11:11 434 header file CO025.dat 2016-05-19 11:53 177M digitized signal(s) CO025.hea 2016-06-14 11:11 445 header file CO027.dat 2016-05-19 11:53 207M digitized signal(s) CO027.hea 2016-06-14 11:11 443 header file CO028.dat 2016-05-19 11:54 309M digitized signal(s) CO028.hea 2016-06-14 11:11 459 header file CO028_n.dat 2016-05-19 11:54 309M digitized signal(s) CO029.dat 2016-05-19 11:54 309M digitized signal(s) CO029.hea 2016-06-14 11:11 452 header file CO029_n.dat 2016-05-19 11:54 309M digitized signal(s) CO030.dat 2016-05-19 11:54 177M digitized signal(s) CO030.hea 2016-06-14 11:11 439 header file CO031.dat 2016-05-19 11:55 309M digitized signal(s) CO031.hea 2016-06-14 11:11 441 header file CO032.dat 2016-05-19 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ClinicalDemogData_COFL.xlsx 2016-06-20 09:38 30K DOI 2016-06-21 17:27 19 FL001.dat 2016-05-19 12:01 281M digitized signal(s) FL001.hea 2016-06-14 11:11 439 header file FL004.dat 2016-05-19 12:01 297M digitized signal(s) FL004.hea 2016-06-14 11:11 439 header file FL005.dat 2016-05-19 12:02 277M digitized signal(s) FL005.hea 2016-06-14 11:11 438 header file FL006.dat 2016-05-19 12:02 309M digitized signal(s) FL006.hea 2016-06-14 11:11 438 header file FL007.dat 2016-05-19 12:03 309M digitized signal(s) FL007.hea 2016-06-14 11:11 441 header file FL008.dat 2016-05-19 12:03 293M digitized signal(s) FL008.hea 2016-06-14 11:11 439 header file FL009.dat 2016-05-19 12:03 103M digitized signal(s) FL009.hea 2016-06-14 11:11 444 header file FL010.dat 2016-05-19 12:04 288M digitized signal(s) FL010.hea 2016-06-14 11:11 442 header file FL011.dat 2016-05-19 12:04 309M digitized signal(s) FL011.hea 2016-06-14 11:11 440 header file FL014.dat 2016-05-19 12:05 309M digitized signal(s) FL014.hea 2016-06-14 11:11 437 header file FL015.dat 2016-05-19 12:06 309M digitized signal(s) FL015.hea 2016-06-14 11:11 443 header file FL016.dat 2016-05-19 12:06 309M digitized signal(s) FL016.hea 2016-06-14 11:11 431 header file FL018.dat 2016-05-19 12:07 303M digitized signal(s) FL018.hea 2016-06-14 11:11 436 header file FL019.dat 2016-05-19 12:07 299M digitized signal(s) FL019.hea 2016-06-14 11:11 441 header file FL020.dat 2016-05-19 12:08 309M digitized signal(s) FL020.hea 2016-06-14 11:11 438 header file FL021.dat 2016-05-19 12:08 280M digitized signal(s) FL021.hea 2016-06-14 11:11 440 header file FL022.dat 2016-05-19 12:09 309M digitized signal(s) FL022.hea 2016-06-14 11:11 437 header file FL023.dat 2016-05-19 12:09 177M digitized signal(s) FL023.hea 2016-06-14 11:11 450 header file FL024.dat 2016-05-19 12:10 309M digitized signal(s) FL024.hea 2016-06-14 11:11 443 header file FL025.dat 2016-05-19 12:10 309M digitized signal(s) FL025.hea 2016-06-14 11:11 436 header file FL026.dat 2016-05-19 12:11 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11:11 435 header file LabWalks/ 2016-06-14 11:16 - MD5SUMS 2016-06-20 09:57 6.3K RECORDS 2016-06-14 11:27 1.8K list of record names ReportHome75h.xlsx 2016-06-20 09:38 22K SHA1SUMS 2016-06-20 09:59 7.5K SHA256SUMS 2016-06-20 10:04 11K