Table 6.

Multivariable logistic regression model for the psychophysical variables and findings from the clinical examination as independent variables and pain severity as dependent variable

	No pain (= 0) versus one-sited moderate pain (= 1)
	Spinal pain severity lifetime Nagelkerke R2 = 0.09, Hosmer-Lemeshow = 0.47 (original data)				Spinal pain severity last week Nagelkerke R2 = 0.07, Hosmer-Lemeshow = 0.99 (original data)
	B (SE)	p value	OR	CI (OR)	B (SE)	p value	OR	CI (OR)
Intercept	-2.69 (0.59)	< 0.001	0.07	0.02–0.22	-3.44 (0.65)	< 0.001	0.03	0.01–0.12
Age	0.16 (0.06)	0.005	1.18	1.05–1.31	0.11 (0.06)	0.049a	1.12	1.00–1.26
Gender (f = 0, m = 1)	-0.31 (0.28)	0.256	0.73	0.43–1.26	0.07 (0.32)	0.826	1.07	0.57–2.03
Head and/or belly pain (No = 0, Yes = 1)	0.51 (0.29)	0.079	1.66	0.94–2.91	0.48 (0.31)	0.120	1.61	0.88–2.94
Sleep problems (No = 0, Yes = 1)	0.16 (0.42)	0.710	1.17	0.51–2.67	-0.28 (0.44)	0.527	0.76	0.32–1.80
Daytime tiredness (No = 0, Yes = 1)	0.03 (0.46)	0.950	1.03	0.41–2.58	0.98 (0.44)	0.033a	2.66	1.09–6.52
Rib hump (No = 0, Yes = 1)	0.02 (0.41)	0.963	1.02	0.45–2.29	-0.10 (0.45)	0.824	0.91	0.38–2.80
Plank position	0.001 (0.003)	0.801	1.00	0.99–1.01	0.003 (0.003)	0.413	1.00	1.00–1.01

	One-sited moderate pain (= 0) versus one-sited severe or multiple moderate or severe pain (= 1)
	Spinal pain severity lifetime Nagelkerke R2 = 0.15, Hosmer-Lemeshow = 0.77 (original data)				Spinal pain severity last week Nagelkerke R2 = 0.13, Hosmer-Lemeshow = 0.86 (original data)
	B (SE)	p value	OR	CI (OR)	B (SE)	p value	OR	CI (OR)
Intercept	-2.11 (0.74)	0.005	0.12	0.03–0.52	-2.19 (1.00)	0.028	0.11	0.02–0.79
Age	0.18 (0.07)	0.011	1.20’	1.01–1.40	0.16 (0.08)	0.047a	1.18	1.00–1.38
Gender (f = 0, m = 1)	0.39 (0.32)	0.230	1.48	0.78–2.80	-0.27 (0.44)	0.537	0.76	0.32–1.81
Head and/or belly pain (No = 0, Yes = 1)	0.39 (0.35)	0.265	1.47	0.74–2.93	0.40 (0.46)	0.390	1.49	0.60–3.70
Sleep problems (No = 0, Yes = 1)	0.33 (0.44)	0.452	1.39	0.59–3.29	0.92 (0.52)	0.079	2.51	0.90–7.01
Daytime tiredness (No = 0, Yes = 1)	0.82 (0.40)	0.041a	2.27	1.04–4.95	0.05 (0.49)	0.924	1.05	0.39–2.79
Rib hump (No = 0, Yes = 1)	-0.30 (0.48)	0.534	0.74	0.28–1.94	0.07 (0.55)	0.894	1.08	0.37–3.14
Plank position	0.003 (0.003)	0.748	1.00	0.99–1.01	-0.002 (0.005)	0.661	1.00	0.99–1.01

	No pain (= 0) versus one-sited severe or multiple moderate or severe pain (= 1)
	Spinal pain severity lifetime Nagelkerke R2 = 0.29, Hosmer-Lemeshow = 0.86 (original data)				Spinal pain severity last week Nagelkerke R2 = 0.25, Hosmer-Lemeshow = 0.83 (original data)
	B (SE)	p value	OR	CI (OR)	B (SE)	p value	OR	CI (OR)
Intercept	-4.44 (0.60)	< 0.001	0.01	0.00–0.04	-5.49 (0.80)	< 0.001	0.00	0.00–0.02
Age	0.32 (0.06)	< 0.001	1.38	1.23–1.54	0.25 (0.06)	< 0.001	1.28	1.13–1.45
Gender (f = 0, m = 1)	0.04 (0.29)	0.888	1.04	0.58–1.86	-0.25 (0.39)	0.523	0.78	0.36–1.71
Head and/or belly pain (No = 0, Yes = 1)	0.83 (0.31)	0.011	2.30	1.22–4.33	0.96 (0.37)	0.012	2.61	1.24–5.51
Sleep problems (No = 0, Yes = 1)	0.53 (0.39)	0.177	1.70	0.78–3.70	0.47 (0.39)	0.229	1.59	0.75–3.40
Daytime tiredness (No = 0, Yes = 1)	0.78 (0.37)	0.037a	2.19	1.05–4.57	1.18 (0.44)	0.011	3.24	1.33–7.92
Rib hump (No = 0, Yes = 1)	-0.29 (0.38)	0.456	0.75	0.35–1.60	0.04 (0.46)	0.939	1.04	0.42–2.54
Plank position	-0.001 (0.003)	0.809	1.00	0.99–1.01	0.003 (0.004)	0.502	1.00	0.99–1.01

CI = confidence interval, f = female, m = male, OR = odds ratio

bold: statistically significant (significance level = 0.017; corrected for multiple comparisons)

^a statistically not significant (significance level = 0.017; corrected for multiple comparisons)