Table 7.

Studies that investigated work ability-related outcomes in patients with MS within different levels of cognitive function.

First author	Country	Population	Main results
			Outcomes	Higher SDMT	Lower SDMT
Chruzander et al. (30)	Sweden	114	Proportion not on full-time disability pension	No impairment: 57%	Impaired cognitive function: 43%
Glanz et al. (31)	US	377	Pearson correlation coefficient (95% CI) between SDMT and absenteeism	–0.08 (–0.18– –0.002)
			Regression coefficient (95% CI) for absenteeism (adjusted)	–0.09 (–0.25–0.02)
			Pearson correlation (95% CI) between SDMT and presenteeism	0.08 (–0.18–0.03)
			Regression coefficient (95% CI) for presenteeism (adjusted)	0.06 (–0.08–0.20)
Kavaliunas et al. (33)	Sweden	903	Work disability at baseline	QIV: 98.5 QIII: 141.2	QII: 182.2 QI: 229.9
			Adjusted IRR (95% CI) for disability after 1 year	QIV: 1 QIII: 1.33 (1.111.60)	QII: 1.41 (1.18–1.70) QI: 1.73 (1.42–2.10)
			Adjusted IRR (95% CI) for disability after 3 years	QIV: 1 QIII: 1.22 (1.03–1.45)	QII: 1.33 (1.12–1.58) QI: 1.68 (1.40–2.02)
			Predicted marginal mean of work disability (annual days) after 1 year	QIV: 143 QIII: 191	QII: 203 QI: 247
			Predicted marginal mean of work disability (annual days) after 3 years	QIV: 154 QIII: 188	QII: 206 QI: 259

IRR, Incidence rate ratio; Q, quartile; SDMT, Symbol Digit Modalities Test. Bold values shows the estimate.