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. 2022 Jan 6;30:1. doi: 10.1186/s12998-022-00411-x

Table 1.

Patient characteristics for groups A (PSC patients) and B (PC patients) (N = 2692)

Characteristics Group A (PSC Patients) n = 1363 Group B (PC Patients) n = 1329 Chi-square/t-test p-value
Age (mean) t =  − 10.45 p < .001
 Age in years at index (initial visit) 48 54.5*
Sex (%) 10.06 p = .002
 Female 64%* 58%
Race/ethnicity (%) 4.07 p = .91
 White/Caucasian 95% 96%
Marital status (%) (n = 2687)
 Cohabiting 57.5% 58.3% 0.199 p = .655
 Not cohabiting 15.1% 15.1%
Employment status (%) 55.15 p < .001
 Employed (FT, PT, self-employed) 66.7% 54.1%
 Retired 16.2% 26.9%
 Unemployed 10.5% 12.0%
 Other (student, unknown) 6.6% 6.9%
Primary diagnosis (pain source) at index date—pain source (%) 1263.12 p < .001
 Radicular 7.7% 17.8%
 Disc 18.3% 2.6%
 Facet or segmental dysfunction 55.8% 4.5%
 Myofascial 3.2% 12.6%
 Non-specific back pain 14.2% 56.7%
 Other 0.9% 5.8%
 Charlson Comorbidity Score (mean) 0.63 0.95* t =  − 5.46 p < .001

Frequencies presented for most common categories. Categories for marital status and employment status were collapsed for ease of analysis. p-values are from Pearson chi-square analyses or t-tests. Mean Charlson score and age based on a t-test. Race/Ethnicity reports Fisher’s Exact probability. Mean age was significantly higher for patients in Group B (PC patient) (p < .001). Frequency of females was significantly higher in Group A (p = .002), and mean Charlson score was significantly higher in Group B (p < .001)