Phosphate, calcium, and oxalate excretion in 1066 individual 24 hour urine samples collected by 246 patients over a five year period
| Phosphate excretion (mmol/24 h) | Calcium excretion (mmol/24 h) | Oxalate excretion (μmol/24 h) | Calcium × oxalate product | |
|---|---|---|---|---|
| Samples were coded “1” to “5” if they were collected at the same time of the year as the periods of the trial (June to July, July to mid August, mid August to mid September, mid September to November, and November to December, respectively). | ||||
| Mean results are presented with 95% confidence intervals. | ||||
| p Values were assessed using the Bonferroni post to hoc test after two way ANOVA (results classified by “period number” and “patient number”). | ||||
| Period 1 | 34.5 (32.5 to 36.7) | 6.6 (6.2 to 7.1) | 375 (352 to 400) | 2496 (2239 to 2782) |
| Period 2 | 35.5 (33.8 to 37.3) | 7.0 (6.5 to 7.6) | 368 (347 to 392) | 2586 (2327 to 2874) |
| Period 3 | 34.7 (31.9 to 37.7) | 6.5 (5.9 to 7.1) | 381 (3347 to 418) | 2468 (2139 to 2848) |
| Period 4 | 32.7 (31.5 to 33.8) | 6.1 (5.8 to 6.4) | 364 (345 to 385) | 2231 (2060 to 2417) |
| Period 5 | 31.4 (29.8 to 33.1) | 5.8 (5.3 to 6.4) | 398 (372 to 427) | 2325 (2065 to 2618) |
| p Values | 1 v 5, p <0.01 | 1 v 4, p <0.01 | 2 v 4, p <0.01 | |
| 2 v 4, p <0.001 | 1 v 5, p <0.001 | |||
| 2 v 5, p <0.001 | 2 v 4, p <0.0001 | |||
| 2 v 5, p < 0.001 | ||||