Table 5: Patients’ medical and psychosocial characteristics across class designation. Each individual latent class is described according to medical and psychosocial scores. The characteristics for the entire studied population are shown in the last column. All percentages have been rounded up to the nearest tenth of decimal point and may not add up to 100 percent. CTQ: Childhood Trauma Questionnaire. PTSD: Posttraumatic Stress Disorder Scale.

Class Total
613
0: no dysfunction
23 (3.2%)
1: low dysfunction
119 (17.8%)
2: moderate dysfunction
314 (53.2%)
3: high dysfunction
157 (25.8%)

Smoker5 (21.7%)37 (31.1%)159 (50.6%)103 (65.6%)304
Gravidity
 0 pregnancies10 (43.4%)32 (26.9%)82 (26.1%)32 (20.4%)156
 1–3 pregnancies9 (39.1%)70 (58.8%)165 (52.5%)88 (56.1%)332
 4–7 pregnancies4 (17.4%)20 (16.8%)75 (23.9%)32 (20.4%)131
 8 or more pregnancies0 (0.0%)2 (1.7%)7 (2.2%)6 (3.8%)15
Parity
 0 births11 (47.8%)36 (30.3%)107 (34.1%)49 (31.2%)203
 1–3 births12 (52.2%)75 (63%)194 (61.8%)96 (61.1%)377
 4 or more births0 (0.0%)12 (10.1%)28 (1%)11 (7%)51
Months of pain
 Less than 3 months1 (4.3%)3 (2.5%)9 (2.9%)9 (5.7%)22
 3 to 6 months2 (8.7%)15 (12.6%)31 (9.9%)16 (10.2%)64
 6 to 12 months8 (34.8%)19 (16%)64 (20.4%)26 (16.6%)117
 12 to 36 months5 (21.7%)33 (27.7%)79 (25.2%)44 (28%)161
 3 to 6 years4 (17.4%)28 (23.5%)65 (20.7%)27 (17.2%)124
 6 years or more2 (8.7%)21 (17.6%)69 (22%)35 (22.3%)127
Number of physicians
 03 (13%)3 (2.5%)3 (1%)3 (2%)12
 16 (26.1%)43 (36.1%)71 (22.6%)34 (21.7%)154
 25 (21.7%)37 (31.1%)96 (30.6%)46 (29.3%)184
 32 (8.7%)14 (12%)59 (18.8%)31 (19.7%)106
 4 or more6 (26.1%)23 (19.3%)88 (28%)44 (28%)161
Number of surgeries
 010 (43.5%)52 (43.7%)90 (28.7%)45 (28.7%)197
 1 7 (30.4%)28 (23.5%)79 (25.2%)41 (26.1%)155
 22 (8.7%)21 (17.6%)30 (9.6%)30 (19.1%)115
 3 or more2 (8.7%)19 (13.1%)41 (13.1%)41 (26.1%)145
CTQ score2,52 (3)2 (3)4 (5)6 (6)4 (5)
Catastrophization score3,518 (7)18 (13)27 (13)40 (12)28 (15)
PTSD score4,56 (14)7 (7)14 (11)25 (13)15 (12)

2Out of a possible 24 points. 3Out of a possible 52 points. 4Out of a possible 68 points. 5Last three rows are the mean (standard deviation).