Number of cases* with severe arm–wrist–hand symptoms or severe neck–shoulder symptoms during follow-up
| Body region | Follow-up instance | |||||||
| 3-month (n=1781†) | 6-month (n=1779‡) | 9-month (n=1761‡) | 12-month (n=1528‡) | 15-month (n=1436‡) | 18-month (n=1426‡) | 21-month (n=1411‡) | 24-month (n=1352‡) | |
| Arm–wrist–hand | 54 (3.0) | 68 (3.8) | 78 (4.4) | 67 (4.4) | 57 (4.0) | 65 (4.6) | 58 (4.1) | 38 (2.8) |
| Neck–shoulder | 90 (5.1) | 124 (7.0) | 82 (4.7) | 135 (8.8) | 78 (5.4) | 82 (5.8) | 55 (3.9) | 60 (4.4) |
↵* Case definition: transition within 3 months of no, irregular or ‘minor’ symptoms to regular or prolonged symptoms together with a pain intensity exceeding 6 on a Von Korff scale or medication use to control pain (absolute number of cases). The number of cases as a percentage of the total number of participants at a particular follow-up instance is shown in parentheses.
↵† Subjects who responded at baseline and at 3-month follow-up.
↵‡ Subjects who responded at baseline, at the particular follow-up instance and at the preceding follow-up instance.