Table 1

Baseline characteristics of participants

CharacteristicMissing n (%)UC
(n = 174)
UC+MI
(n = 170)
UC+SVAI
(n = 170)
Age (years), median (IQR)49 (40–55)49 (41–56)49 (41–56)
Women, n (%)94 (54)99 (58)100 (59)
Married/living with partner, n (%)1 (0.2)120 (69)119 (70)119 (70)
Norwegian as first language, n (%)2 (0.4)151 (87)154 (91)145 (86)
Education, n (%)
 Compulsory education21 (12)14 (8)20 (12)
 High school92 (53)95 (56)84 (49)
 College or university <4 years40 (23)46 (27)49 (29)
 College or university ≥4 years21 (12)15 (9)17 (10)
Health literacy* (12–72), median (IQR)49 (10)51 (44–60)53 (45–59)52 (44–59)
Smokers, n (%)39 (22)35 (21)36 (21)
Body mass index (kg/m2), median (IQR)13 (3)28 (24–31)27 (24–31)27 (24–31)
Days of physical activity previous week, n (%)1 (0.2)
 0 days65 (37)54 (32)64 (38)
 1-2 days46 (26)43 (25)39 (23)
 3-4 days38 (22)45 (27)41 (24)
 5-7 days25 (14)27 (16)26 (15)
Musculoskeletal health† (0–56), mean (SD)21 (4)27 (9)27 (8)27 (8)
Work ability‡ (0–10), median (IQR)3 (0.6)2 (0–5)3 (1–5)3 (0–5)
ÖMPSQ-SF§ (≥60), n (%)65 (37)55 (32)59 (35)
Keele STarT MSK tool (0–12)
 High risk (≥9), n (%)61 (35)49 (29)48 (28)
 Medium risk (5–8), n (%)85 (49)86 (51)98 (58)
 Low risk (<5), n (%)28 (16)35 (21)24 (14)
High-risk for long-term sick leave¶, n (%)38 (22)36 (21)35 (21)
Work satisfaction** (0–10), median (IQR)1 (0.2)8 (6–9)8 (7–9)8 (6–9)
In conflict with employer, yes n (%)4 (0.8)6 (3.5)5 (3.0)14 (8.3)
Followed-up by employer, n (%)7 (1)
 No follow-up65 (38)72 (44)72 (43)
 Dialogue meeting or follow-up plan64 (37)53 (32)65 (38)
 Dialogue meeting and follow-up plan44 (25)40 (24)32 (19)
White-collar workers, n (%)58 (33)56 (33)61 (36)
Blue-collar workers, n (%)116 (67)114 (67)109 (64)
Work, n (%)
 Full-time120 (69)110 (65)111 (65)
 Part-time 50–99% of full work hours per week39 (22)53 (31)48 (28)
 Part-time <50% of full work hours per week15 (9)7 (4)11 (6)
Graded disability pension††, yes n (%)5 (1)15 (9)12 (7)9 (5)
Sickness absence days previous year (work days‡‡), median (IQR)5 (1)38 (30–50)35 (31–50)36 (26–50)
Duration of consecutive sick leave at baseline (calendar days), median (IQR)5 (1)51 (50–55)51 (50–55)51 (49–56)
Sick leave at baseline, n (%)5 (1)
 Full-time sick leave103 (60)109 (65)103 (61)
 Sick leave 50–99% of contracted work hours65 (38)54 (32)63 (37)
 Sick leave <50% of contracted work hours3 (2)6 (4)3 (2)
Area of body pain, n (%)14 (3)
 Lower limb6 (4)18 (11)15 (9)
 Upper limb30 (18)30 (18)30 (18)
 Neck12 (7)12 (7)10 (6)
 Back34 (20)42 (25)43 (26)
 Multisite pain12 (7)8 (5)10 (6)
 Joint disorders20 (12)13 (8)10 (6)
 Fractures14 (8)16 (10)11 (7)
 Other40 (24)26 (16)38 (23)
  • The distribution was skewed for all continuous variables, except for the MSK-HQ.

  • *Measured with the Health Literacy Scale Questionnaire.

  • †Measured with the Musculoskeletal Health Questionnaire (MSK-HQ).

  • ‡Measured with a single question from the Work Ability Index.

  • §ÖMPSQ-SF: The Örebro MSK Pain Screening Questionnaire Short Form (0–100).

  • ¶High-risk group in the MI-NAV trial: ≥60 on the ÖMPSQ-SF and ≥9 on the Keele STarT MSK Tool.

  • **Work satisfaction: 0=not satisfied at all, 10=totally satisfied.

  • ††Individuals who work part-time and receive a graded disability pension.

  • ‡‡Lost workdays due to sick leave, adjusted for work hours per week and amount of sick leave.

  • MI, motivational interviewing; n, number of participants; SVAI, stratified vocational advice intervention; UC, usual case management.