Descriptive statistics of the entire cohort (first column), the group of workers from whom video recordings were available (second column) and the group of workers mechanical loads were calculated from in the current study (third column)
| Total | Recorded | Analysed | |
|---|---|---|---|
| Number of workers (n) | 1131 | 371 | 93 |
| Age (years) | 36 (9) | 36 (9) | 36 (9) |
| Males (n (%)) | 800 (71%) | 216 (68%) | 61 (66%) |
| LBP (n (%)) | 600 (53%) | 199 (54%) | 48 (52%) |
Number of subjects, age, gender, LBP during in one of the four questionnaires, number of MMH tasks.
LBP, low-back pain; MMH, manual materials handling.