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Table 1 Definitions of 4 the main patterns and 16 predefined trajectory subgroups used for analysis as presented in Kongsted et al. [9]

From: Neck pain patterns and subgrouping based on weekly SMS-derived trajectories

Pattern Subgroup label Variation Days Variation Intensity Intensity level
ONGOING 1. Severe > 4 days with NP each week Intensity stays within +/−  1 of mean value Mean intensity
≥6
2. Moderate > 4 days with NP each week Intensity stays within +/−  1 of mean value Mean intensity
≥4 and < 6
3. Mild > 4 days with NP each week Intensity stays within +/− 1 of mean value Mean intensity
≥2 and < 4
4. Minor/recovery - no pain-free 4-weeks periods or
- always pain = 0 (recovered)
Intensity stays within +/− 1 of mean value Mean intensity
< 2
PERSISTENT FLUCTUATING 5. Severe No pain-free 4-weeks periods Difference between mean and min or max value exceeds 1 Mean intensity
≥6
6. Moderate No pain-free 4-weeks periods Difference between mean and min or max value exceeds 1 Mean intensity
≥4 and < 6
7. Mild No pain-free 4-weeks periods Difference between mean and min or max value exceeds 1 Mean intensity
≥2 and < 4
8. Minor No pain-free 4-weeks periods Difference between mean and min or max value exceeds 1 Mean intensity
< 2
EPISODIC 9. Severe Pain-free periods of min. 4 weeks in a row between weeks with pain. Four weeks or more without pain in the beginning or end of the course does not indicate a new episode.   Max intensity
≥6
10. Moderate Pain-free periods of min. 4 weeks in a row between weeks with pain. Four weeks or more without pain in the beginning or end of the course does not indicate a new episode.   Max intensity
≥4 and < 6
11. Mild Pain-free periods of min. 4 weeks in a row between weeks with pain. Four weeks or more without pain in the beginning or end of the course does not indicate a new episode.   Max intensity
≥2 and < 4
12. Minor Pain-free periods of min. 4 weeks in a row, but not always pain = 0. Four weeks or more without pain in the beginning or end of the course does not indicate a new episode.   Max intensity
< 2
SINGLE EPISODE 13. Severe One single episode or flare-up lasting 1–2 weeks (which are not the first or the last week of measurement)   Max intensity
≥6
14. Moderate One single episode or flare-up lasting 1–2 weeks (which are not the first or the last week of measurement)   Max intensity
≥4 and < 6
15. Mild One single episode or flare-up lasting 1–2 weeks (which are not the first or the last week of measurement)   Max intensity
≥2 and < 4
16. Minor One single episode or flare-up lasting 1–2 weeks (which are not the first or the last week of measurement)   Max intensity
< 2