Table 1.
Demographics and baseline characteristics of the participating patients
| Characteristics | BiCRI (n = 47) | Microfracture (n = 45) | P value |
|---|---|---|---|
| Age (years) | |||
| Mean (SD) | 31.4(11.62) | 30.9(11.23) | 0.84 |
| Height (cm) | |||
| Mean (SD) | 170.07 (6.96) | 171.24 (8.63) | 0.44 |
| Weight (kg) | |||
| Mean (SD) | 74.02 (12.71) | 73.02 (12.54) | 0.72 |
| Body mass index (kg/m2) | |||
| Mean (SD) | 25.59 (4.21) | 24.82 (3.37) | 0.33 |
| Gender | |||
| Male | 37 (78.7%) | 35 (77.8%) | 0.94 |
| Female | 10 (21.3%) | 10 (22.2%) | |
| Lesion size | |||
| Lesion size ≤ 12.5 mm | 32 (68.1%) | 31 (68.9%) | 0.90 |
| Lesion size > 12.5 mm | 15 (31.9%) | 14 (31.1%) | |
| Smoking history | |||
| Current smoker | 9 (19.1%) | 7 (15.6%) | 0.96 |
| Quit in the last 6 months | 2 (4.3%) | 2 (4.4%) | |
| Quit more than 6 months ago | 3 (6.4%) | 4 (8.9%) | |
| Has never smoked | 33 (70.2%) | 32 (71.1%) | |
| Education level | |||
| Less than high school | 4 (8.5%) | 3 (6.7%) | 0.85 |
| Graduated from high school | 12 (25.5%) | 11 (24.4%) | |
| Some college education | 8 (17.0%) | 12 (26.7%) | |
| Graduated from college | 18 (38.3%) | 15 (33.3%) | |
| Postgraduate school or degree | 5 (10.6%) | 4 (8.9%) | |
| Activity level | |||
| A high competitive sports person | 7 (14.9%) | 6 (13.3%) | 0.85 |
| Well trained and frequently participates in sports | 14 (29.8%) | 17 (37.8%) | |
| Ssometimes participates in sports | 18 (38.3%) | 15 (33.3%) | |
| Does not participate in sports | 8 (17.0%) | 7 (15.6%) | |
| IKDC-2000 Subjective Knee Evaluation Form | |||
| Mean (SD) | 60.11 (15.49) | 59.64 (17.38) | 0.87 |
P value: ANCOVA with treatment and site as covariates for continuous variables; Cochran–Mantel–Haenszel test adjusted for the study site for categorical variables