| Mean | SD | Maximum | Minimum |
---|---|---|---|---|
Maximum level of low back pain in the past year | 8.81 | 1.13 | 10 | 7 |
Number of days without pain in the past year | 37.04 | 51.82 | 174 | 0 |
Number of days with low pain in the past year | 149.37 | 86.12 | 303 | 0 |
Number of days with moderate pain in the past year | 119.29 | 51.94 | 210 | 22 |
Number of days with high pain in the past year | 57.04 | 68.72 | 262 | 0 |