Table 3.

Associations Between Changes in the 12-Month Follow-Up Period in HRQoL, BMI, and RTWSE with WAS in Combination with Work Absence and RTWEXP, Adjusted for the Background Variables. Unadjusted and Adjusted Multiple Regression Analyses

	Unadjusted Analysis		p values	Intermediate Analysis		p values	Final Analysis		p values
	Ba	95% CI		B	95% CI		B	95% CI
Age	0.03	−0.03: 0.1	0.335
Gender
Male	0			0			0
Females	−0.64	−1.99: 0.61	0.311	−0.88	−1.88:0.11	0.081	−0.55	−1.56: 0.46	0.283
Sick leave diagnosis			0.067			0.090			0.214
MS b	0			0			0
EMDc	1.82	0.29: 3.35	0.021	1.18	0.17:2.53	0.086	1.13	−0.14: 2.40	0.079
All otherd	0.66	−0.77:2.08	0.362	−0.22	−1.43:0.96	0.696	0.29	−1.83: 0.36	0.184
Educational level (years)			0.117			0.144			0.05
College/university (>14)	0.48	−0.82: 1.78	0.460	−1.00	−2.08:0.08	0.067	−0.73	−1.83: 0.36	0.184
High school (<13)	0			0			0
Elementary school (<10)	−1.74	−3.88: 0.39	0.108	−1.24	−3.14:0.67	0.198	−2.04	−3.71: −0.36	0.018
WASe	0.40	0.18: 0.62	0.001	0.55	0.27:0.83	<0.001	0.49	0.28: 0.71	<0.001
HRQoLf	0.19	0.07: 0.31	0.003	0.31	0.17:0.44	<0.001	0.27	0.16: 0.38	<0.001
BMIf	−0.03	−0.25: 0.18	0.749
RTWSEf	0.01	0.00: 0.03	0.026	0.00	−0.01:0.01	0.737
RTWEXPe	−0.38	−0.71: −0.05	0.025	0.20	−0.19:0.58	0.305
Work absence daysg	−0.01	−0.01: −0.00	0.004	0.00	−0.01:0.01	0.570

Notes: Univariate and intermediate analyses. p values less than 0.20 are marked with bold and further included in the intermediate analyses. Multiple regression analysis: Intermediate and final analyses are controlled for the effect of background variables and HRQoL baseline. ^aUnstandardized regression coefficient (B). ^bMusculoskeletal diagnosis. ^cEndocrine, metabolic, and nutritional diagnosis. ^dAll other reported diagnosis. ^eValue of baseline. ^fValue of change from baseline to 12 months. ^gWork absence, measured as the number of days 1 year before baseline. In the final analyses, statistically significant p values (≤ 0.05) marked in bold. R² = 0.49 for final analysis.