Table 2.
Associations between patient characteristics and early improvement trajectory
| Cohort Characteristics | WOMAC Pain | WOMAC Function | ||||
|---|---|---|---|---|---|---|
| Group 1: Optimal Early Pain Improvement (n = 67)a | Group 2: Suboptimal Early Pain Improvement (n = 40) | P | Group 1:Optimal Early Functional Improvement (n = 66) | Group 2: Suboptimal Early Functional Improvement (n = 41) | P | |
| Age group, y, n (%) | 0.705 | 0.578 | ||||
| <65 | 36 (61.0) | 23 (39.0) | … | 35 (59.3) | 24 (40.7) | … |
| 65+ | 31 (64.6) | 17 (35.4) | … | 31 (64.6) | 17 (35.4) | … |
| Sex, n (%) | 0.823 | 0.976 | ||||
| Male | 32 (61.5) | 20 (38.5) | … | 32 (61.5) | 20 (38.5) | … |
| Female | 35 (63.6) | 20 (36.4) | … | 34 (61.8) | 21 (38.2) | … |
| Race/ethnicity, n (%) | 0.191 | 0. 535 | ||||
| Multiracial: Black, Hispanic, mixed race | 6 (46.2) | 7 (53.8) | … | 7 (53.8) | 6 (46.2) | … |
| White | 61 (64.9) | 33 (35.1) | … | 59 (62.8) | 35 (37.2) | … |
| BMI group, n (%) | 0.403 | 0.465 | ||||
| <25 | 15 (71.4) | 6 (28.6) | … | 14 (66.7) | 7 (33.3) | … |
| ≤25‐30 | 20 (64.5) | 11 (35.5) | … | 19 (61.3) | 12 (38.7) | … |
| ≤30‐35 | 20 (64.5) | 11 (35.5) | … | 21 (67.7) | 10 (32.3) | … |
| ≥35 | 11 (47.8) | 12 (52.2) | … | 11 (47.8) | 12 (52.2) | … |
| Charlson Comorbidity Index group, n (%) | 0.181 | 0.736 | ||||
| 0 | 31 (72.1) | 12 (27.9) | … | 27 (62.8) | 16 (37.2) | … |
| 1 | 15 (68.2) | 7 (31.8) | … | 15 (68.2) | 7 (31.8) | … |
| 2 | 9 (45.0) | 11 (55.0) | … | 13 (65.0) | 7 (35.0) | … |
| 3+ | 12 (57.1) | 9 (42.9) | … | 11 (52.4) | 10 (47.6) | … |
| Pain Catastrophizing Scale, mean (SD)b | 10.7 (10.0) | 14.8 (13.0) | 0.072 | 9.7 (10.4) | 16.2 (11.8) | 0.003 |
| Index of MSK functional limitations, mean (SD)c | 3.4 (2.0) | 3.7 (2.2) | 0.566 | 3.3 (1.9) | 4.0 (2.4) | 0.097 |
| MHI‐5 category: <68 vs ≥68, n (%) | 0.028 | 0.003 | ||||
| <68 | 11 (44.0) | 14 (56.0) | … | 9 (36.0) | 16 (64.0) | … |
| ≥68 | 56 (68.3) | 26 (31.7) | … | 57 (69.5) | 25 (30.5) | … |
| Use of any supportive device in the past week, n (%) | 0.066 | 0.001 | ||||
| No | 50 (68.5) | 23 (31.5) | … | 53 (72.6) | 20 (27.4) | … |
| Yes | 17 (50.0) | 17 (50.0) | … | 13 (38.2) | 21 (61.8) | … |
Abbreviation: BMI, body mass index; MHI‐5, five‐item Mental Health Index; MSK, musculoskeletal; WOMAC, Western Ontario and McMaster Universities Arthritis Index.
t tests were performed for continuous variables; χ2 tests were performed for categorical variables.
a
Mean (SD) is presented for continuous variables; n (%) is presented for categorical variables.
b
Scaled at 0‐52, with 52 being the worst.
c
Scaled at 0‐12, with 12 being the worst.