. 2021 Sep 7;22:178. doi: 10.1186/s12875-021-01529-2

Table 3.

Outcomes from electronic patient record data

	Intervention group n = 178	Control group n = 186	intervention vs control	Age adjusted intervention vs control
	%(n)	%(n)	OR (95% CI); P value	OR (95% CI); P value
Imaging^a (yes/no)
3 months	10.8 (19)	16.7 (31)	0.57 (0.27 to 1.22); 0.147	0.60 (0.29–1.24); 0.166
12 months	17.5 (31)	29.7 (54)	0.50 (0.30 to 0.83); 0.008	0.52 (0.32 to 0.84); 0.007
Radiographs^a
3 months	5.6 (10)	9.1 (17)	0.57 (0.25 to 1.29); 0.178	0.58 (0.25–1.33); 0.199
12 months	8.4 (15)	14.7 (27)	0.55 (0.34 to 0.88); 0.013	0.58 (0.37 to 0.90); 0.016
Magnetic resonance imaging (MRI) ^a
3 months	7.3 (13)	8.6 (16)	0.86 (0.49 to 1.52); 0.610	0.90 (0.55–1.48); 0.688
12 months	12.8 (23)	21.1 (39)	0.61 (0.44 to 0.84); 0.002	0.64 (0.49 to 0.84); 0.001
Computed tomography (CT) ^a
3 months	0 (0)	1.6 (3)	^c	^c
12 months	0.6 (1)	2.2 (4)	^c	^c
MRI + CT^a
3 months	7.3 (13)	9.1 (17)	0.81 (0.45 to 1.46);0.475	0.86 (0.51–1.4); 0.555
12 months	13.4 (24)	21.7 (40)	0.60 (0.39 to 0.91); 0.016	0.64 (0.45 to 0.91); 0.014
	mean(SD); sum	mean(SD); sum	RR (95% CI); P-value	RR (95% CI); P-value
Sick leave days^b
3 months	3.8 (11.2); 664	8.4 (20.2); 1526	0.47 (0.26 to 0.83); 0.010	0.48 (0.29 to 0.81); 0.006
12 months	7.5 (31.3); 1330	20.8 (59.2); 3717	0.36 (0.18 to 0.72); 0.004	0.39 (0.22–0.70); 0.002
Physician appointments ^b
3 months	1.1 (1.4); 156	1.2 (1.5); 188	0.92 (0.44 to 1.9); 0.813	0.92 (0.44 to 1.9); 0.822
12 months	1.6 (2.1); 231	1.8 (2.3); 283	0.87 (0.4 to 1.9); 0.725	0.87 (0.41 to 1.78); 0.678
Physiotherapist appointments^b
3 months	1.2 (1.7); 212	1.3 (1.1); 235	0.88 (0.56 to 1.40); 0.601	0.89 (0.55 to 1.43); 0.618
12 months	1.7 (2.6); 297	2.0 (2.2); 359	0.83 (0.55 to 1.2); 0.356	0.83 (0.56 to 1.23); 0.829
Nurse appointments^b
3 months	0.3 (1.2); 60	0.2 (0.7); 41	1.3 (0.20 to 8.42); 0.772	1.3 (0.20 to 9.69); 0.749
12 months	0.6 (1.8); 107	0.3 (1.0); 60	1.72 (0.34 to 8.66); 0.514	1.93 (0.34 to 11.04); 0.458
Secondary health care appointments (physiatrist + orthopedist)^b
3 months	0.3 (1.0); 48	0.3 (0.7); 55	1.06 (0.68 to 1.65); 0.801	1.10 (0.73 to 1.64); 0.662
12 months	0.6 (1.6); 87	0.7 (1.8); 132	0.81 (0.49 to 1.35); 0.426	0.84 (0.53 to 1.33); 0.447

^aDifference between intervention and control groups analysed with logistic regression using generailzed estimating equations with exchangeable working correlation matrix

^bDifference between intervention and control groups analysed with Poisson regression using general estimating equations with exchangeable working correlation matrix

Odds Ratio (OR), Confidence Interval (CI), Risk Ratio (RR)

^cOR not possible due to zero frequency