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. 2020 Sep 10;11:2150132720953680. doi: 10.1177/2150132720953680

Table 2.

PDQ Scores and Predicting Variables Using Multivariate Linear Regression.

Variable*
(n)
Baseline PDQ Mean (SD) Follow-up PDQ Mean (SD) PDQ change from baseline (95% CI) Regression coefficient, b P-value
All participants (n = 35) 92.4 (6.1) 81.9 (7.7) −10.6 (−22.3 – 1.2) .08
Intervention
 Chiropractic team (n = 20) 79.9 (8.6) 55.0 (8.9) −25.0 (−40.3 – −9.6) 31.0 .01
 Pain team (n = 12) 109.8 (6.9) 113.1 (6.2) 3.3 (−10.4 – 17.0)
Sex
 Female (n = 19) 95.4 (8.0) 79.2 (10) −16.2 (−35.8 – 3.4) .71
 Male (n = 16) 88.9 (9.5) 85.1 (11.8) −3.9 (−16.7 – 8.9)
BMI
 <30 (n = 17) 96.0 (10.7) 84.8 (11.2) −11.2 (−28.5 – 6.2) .34
 ≥30 (n = 18) 89.1 (6.3) 79.1 (10.9) −10.0 (−27.7 – 7.7)
Other pain diagnosis
 Yes (n = 14) 103.8 (6.7) 109.6 (8.4) 5.9 (−11.8 – 23.6) .88
 No (n = 21) 84.9 (8.8) 63.3 (9.7) −21.5 (−36.4 – −6.7)
Hypertension
 Yes (n = 22) 95.8 (6.4) 87.1 (8.8) −8.7 (−24.1 – 6.8) .13
 No (n = 13) 86.8 (12.5) 73.0 (14.5) −13.8 (−34.4 – 6.9)
Mental health diagnosis
 Yes (n = 13) 106.8 (9.1) 91.6 (12.1) −15.2 (−37.6 – 7.3) .05
 No (n = 22) 84.0 (7.6) 76.1 (9.9) −7.9 (−22.5 – 6.7)
COVID
 Pre-COVID (n = 23) 98.7 (6.1) 76.2 (9.1) −22.6 (−35.1 – −10.0) 25.0 <.01
 Post-COVID (n = 12) 80.3 (13.0) 92.8 (14.2) 12.4 (−8.3 – 33.2)
*

Excluded variables with subgroups of n ≤ 6 (age, race, insurance type, diabetes).

Multivariate linear regression, R2 = 0.63. Only statistically significant coefficients displayed.

This represents a paired t-test determining significance of the baseline and follow-up PDQ.

This variable had a statistically significant association with a change in PDQ score on univariate analysis using a two-sample t-test, p = 0.02.

before/after March 1, 2020.