Association between Pfirrmann grade and related factors
| Disc level | Variable | OR* (95% CI) |
|---|---|---|
| L1–2 | Age | 0.942 (0.917 to 0.968) |
| Type of job | ||
| Administrative | 1.000 | |
| Field | 1.194 (0.442 to 3.228) | |
| L2–3 | Age | 0.917 (0.892 to 0.943) |
| Type of job | ||
| Administrative | 1.000 | |
| Field | 1.333 (0.500 to 3.551) | |
| L3–4 | Age | 0.938 (0.905 to 0.973) |
| Type of job | ||
| Administrative | 1.000 | |
| Field | 1.734 (0.483 to 6.226) | |
| L4–5 | Age | 0.938 (0.914 to 0.962) |
| Type of job | ||
| Administrative | 1.000 | |
| Field | 3.498 (1.241 to 9.860) | |
| L5–S1 | Age | 0.951 (0.927 to 0.974) |
| Type of job | ||
| Administrative | 1.000 | |
| Field | 1.181 (0.470 to 2.969) |
L and S refer to lumbar and sacral vertebrae, respectively.
*Adjusted for age, gender, body mass index, socioeconomic status and work-related variables.