Table 1.
Demographic of the subjects.
| KL grade | P value counterpart | 0 | 1 | 2 | 3 | 4 | (Overall) | Overall | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KL0 | KL0 | KL1 | KL0 | KL1 | KL0 | KL1 | |||||||||
| Subject | Number | 308 | 70 | 75 | 13 | 3 | 469 | ||||||||
| Ratio | 0.66 | 0.15 | 0.16 | 0.03 | 0.01 | 1.00 | |||||||||
| Gender | Female | 139 | 32 | 45 | 8 | 3 | 227 | NS# | |||||||
| Male | 169 | 38 | 30 | 5 | 0 | 242 | |||||||||
| Female ratio | 0.45 | 0.46 | 0.60 | 0.62 | 1.00 | 0.48 | |||||||||
| Age | Median | 49 | 59.5 | ** | 66 | *** | ** | 71 | *** | * | 75 | * | * | 54 | *** |
| Maximum | 79 | 79 | 78 | 76 | 79 | 79 | |||||||||
| Minimum | 30 | 30 | 35 | 51 | 75 | 30 | |||||||||
| BMI | Median | 22.4 | 22.1 | 23.6 | * | 24.9 | ** | ** | 22.5 | 22.7 | *** | ||||
| Maximum | 41.9 | 31.4 | 29.7 | 30.7 | 24.6 | 30.7 | |||||||||
| Minimum | 16.3 | 16.3 | 17.3 | 22.5 | 22.1 | 16.3 | |||||||||
*P < 0.05, **P < 0.01, ***P < 0.001, NS: not significant.
#KL4 was excluded from the test because the sample size was less than 5.
There were no significant differences between the two pairs of KL2, KL3, and KL4.