Table 2 Results of the methodological quality assessment.

Cohort (first author)	Study design		Exposure and outcome assessment						Data analysis
	Participation rate	Response at follow‐up	Duration computer use	Ergonomic factors	Psychosocial factors	Physical factors leisure time	Exposure change	Outcome	Statistical model	Confounding	Statistical power	Score* (%)
BIT
Jensen20	?†	?	?	?	?	−	+	+	+	+	+	45
Juul‐Kristensen21	?	?	?	?	?	−	+	+	+	+	+	45
NUDATA
Andersen22	?	+	?	?	?	+	+	+	+	+	+	64
Kryger23	?	+	?	?	?	+	?	+	+	+	+	55
Brandt24	?	+	?	?	?	+	?	+	+	+	+	55
Lassen25	?	+	?	?	?	+	?	+	+	+	+	55
Bergqvist et al
Bergqvist19	+	+	?	?	?	?	+	?	+	−	+	45
Marcus et al
Marcus26	+	+	?	+	?	+	+	?	+	+	+	73
Korhonen et al
Korhonen27	+	?	?	?	?	+	?	+	+	+	+	55
Positive (%)	33	67	0	11	0	67	56	78	100	89	100

BIT, Behavioural Inattention Test; NUDATA, Neck and Upper extremity Disorders Among Technical Assistants.

*The percentage of positive items over the total number of items.

†+, positive; −, negative; ?, unclear (insufficient information available).