Table 1. Baseline characteristics of study subjects stratified by the interquartile range of residual GFR.
| Variables | Total | residual GFR (mL/min per 1.73m2)a | F/χ2 | P b | |||
|---|---|---|---|---|---|---|---|
| Q1 (0–0.36) | Q2 (0.36–1.68) | Q3 (1.68–2.99) | Q4 (2.99–12.32) | ||||
| age | 44.52±13.19 | 45.17±14.64 | 41.53±11.34 | 45.39±12.29 | 45.95±14.20 | 0.89 | 0.450 |
| sex | 0.15 | 0.695 | |||||
| male | 75(48.39%) | 23(30.67%) | 16(21.33%) | 14(18.67%) | 22(29.33%) | ||
| female | 80(51.61%) | 16(20.00%) | 22(27.50%) | 25(31.25%) | 17(21.25%) | ||
| occupation | 0.92 | 0.632 | |||||
| high strength work | 36(25.17%) | 9(25.00%) | 10(27.78%) | 12(33.33%) | 5(13.89%) | ||
| moderate intensity work | 46(32.17%) | 10(21.74%) | 15(32.61%) | 9(19.57%) | 12(26.09%) | ||
| light physical activity | 61(42.66%) | 18(29.51%) | 9(14.75%) | 14(22.95%) | 20 (32.79%) | ||
| education | 0.71 | 0.702 | |||||
| primary school or below | 37(24.50%) | 12(32.43%) | 7(18.92%) | 10(27.03%) | 8(21.62%) | ||
| junior or high school | 87(57.62%) | 19(21.84%) | 24(27.59%) | 22(25.29%) | 22(25.29%) | ||
| college or above | 27(17.88%) | 7(25.93%) | 6(22.22%) | 5(18.52%) | 9(33.33%) | ||
| hypertension or diabetes | 2.86 | 0.091 | |||||
| no | 100(64.52%) | 28(28.00%) | 29(29.00%) | 19(19.00%) | 24(24.00%) | ||
| yes | 55(35.48%) | 11(20.00%) | 9(16.36%) | 20(36.36%) | 15(27.28%) | ||
a classified into four groups based on quartiles of residual GFR.
b Comparisons were made by one-way ANOVA or Kruskal-Wallis H test for continuous variables while Cochran-Mantel-Haenszel χ2test for categorical variables.