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Table 1 Neck/shoulder and elbow/hand pain in sonographers at baseline and follow-up

From: Neck and upper extremity pain in sonographers – a longitudinal study

 Neck/shouldersElbows/hands
  Pain at baselinePain at follow-up Pain at baselinePain at follow-up
 NN (%)N (%)NN (%)N (%)
Participants at baseline289169 (58) 29185 (30) 
Participants at follow-up205125 (61)140 (68)20863 (30)65 (31)
Excluded at follow-up43  40  
Missing outcome data at follow-up42 (50) 0 
Retired or on parental leave127 (58)4 (33)123 (25)1 (8)
No longer fulfilled inclusion criteriaa2717 (63)13 (48)2812 (43)6 (21)
Non-responders4116 (39) 426 (14) 
  1. a Other kinds of leave > 50%, changed work or < 4 h/ ultrasound week