Table 1 Characteristics for participants (adults and adolescents)
From: Are MRI-defined fat infiltrations in the multifidus muscles associated with low back pain?
| Adults | Adolescents | |||||
|---|---|---|---|---|---|---|
| Men | Women | |||||
| Variables | n | (%) | (%) | (%) | n | (%) |
| Sex | ||||||
| Male | 199 | (48) | -- | -- | 205 | (47) |
| Female | 213 | (52) | -- | -- | 234 | (53) |
| LBP variables | ||||||
| LBP month | -- | -- | 98 | (22) | ||
| LBP year | 289 | (70) | (70) | (70) | 182 | (41) |
| LBP ever | 352 | (85) | (85) | (85) | -- | -- |
| Fat infiltration in LMM in at least one level | ||||||
| Grade 0 (none) | 78 | (19) | (29) | (10) | 379 | (86) |
| Grade 1 (slight) | 293 | (71) | (63) | (79) | 60 | (14) |
| Grade 2 (severe) | 41 | (10) | (9) | (11) | 0 | (0) |
| Body weight | ||||||
| Normal | 234 | (57) | (46) | (68) | 369 | (84) |
| Overweight | 131 | (32) | (47) | (18) | 56 | (13) |
| Obese | 44 | (11) | (8) | (14) | 11 | (3) |
| Workload | ||||||
| Sedentary | 89 | (22) | (20) | (24) | -- | -- |
| Sedentary/walking | 144 | (35) | (30) | (40) | -- | -- |
| Light physical | 92 | (22) | (19) | (26) | -- | -- |
| Heavy physical | 84 | (21) | (31) | (11) | -- | -- |
| Physical activity | ||||||
| Not active | 59 | (14) | (12) | (17) | -- | -- |
| Walking/cycling >4 hours | 204 | (50) | (48) | (51) | -- | -- |
| Active sports >3 hours | 140 | (34) | (38) | (31) | -- | -- |
| Competitive sports | 9 | (2) | (3) | (2) | -- | -- |
| Weekly hours of sports activity | ||||||
| <2 | 91 | (22) | (27) | (18) | 117 | (27) |
| 2 – 4 | 107 | (26) | (23) | (29) | 120 | (27) |
| 4 – 6 | 103 | (25) | (24) | (26) | 97 | (22) |
| >6 | 111 | (27) | (27) | (27) | 92 | (19) |
| Daily bicycling | ||||||
| Not every day | -- | -- | -- | -- | 66 | (15) |
| Every day | -- | -- | -- | -- | 370 | (85) |