Table 4.
Percentage of GFR1p measures within 10% of reference stratified by GFR-levels
| Formula | Time (h) | Proportion of measures within 10% (P10) of reference method (95% CI) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CKD 1 | CKD 2 | CDK 3 | CKD 1–3 | CKD 4–5 | CKD 1–5 | ||||||||
| % of measures | 95% CI | % of measures | 95% CI | % of measures | 95% CI | % of measures | 95% CI | % of measures | 95% CI | % of measures | 95% CI | ||
| GFR1p-Fleming | 2 | 97 | 83– 99 | 88 | 71–96 | 78 | 58–90 | 88 | 80– 94 | 39 | 20–61 | 79 | 70–86 |
| 3 | 90 | 74–96 | 96 | 81–99 | 91 | 73–98 | 92 | 84–96 | 39 | 20–61 | 82 | 73–89 | |
| 3.5 | 83 | 65–92 | 96 | 81–99 | 91 | 73–98 | 90 | 81–95 | 41 | 22–64 | 81 | 72–88 | |
| 4 | 79 | 62–90 | 85 | 66–94 | 78 | 58–90 | 81 | 71–88 | 50 | 29–71 | 75 | 65–83 | |
| 5 | 69 | 51–83 | 46 | 29–65 | 39 | 22–59 | 53 | 42 –63 | 67 | 44–84 | 55 | 45–65 | |
| GFR1p-Ham&Piepz | 2 | 79 | 62–90 | 96 | 81–99 | 57 | 37–74 | 78 | 68–86 | 0 | 0–18 | 64 | 54–72 |
| 3 | 62 | 44–77 | 54 | 35–71 | 39 | 22–59 | 53 | 42–63 | 33 | 16–56 | 49 | 39–59 | |
| 3.5 | 66 | 47–80 | 35 | 19–54 | 13 | 5–32 | 40 | 30–51 | 47 | 26–69 | 41 | 32–51 | |
| 4 | 41 | 26–59 | 35 | 19–54 | 0 | 0–14 | 27 | 18–38 | 17 | 6–39 | 25 | 17–35 | |
| 5 | 34 | 20–53 | 19 | 9–38 | 0 | 0–14 | 19 | 12–29 | 0 | 0–18 | 16 | 10–24 | |
| GFR1p-Groth&Aasted | 2 | 79 | 62–90 | 81 | 62–91 | 57 | 37–74 | 73 | 62–82 | 28 | 12–51 | 65 | 55–73 |
| 3 | 14 | 5–31 | 12 | 4–29 | 4 | 1–21 | 10 | 5–19 | 22 | 9–45 | 12 | 7–21 | |
| 3.5 | 0 | 0–2 | 0 | 0–13 | 0 | 0–14 | 0 | 0–5 | 0 | 0–18 | 0 | 0–4 | |
| 4 | 0 | 0–12 | 0 | 0–13 | 0 | 0–14 | 0 | 0–5 | 0 | 0–18 | 0 | 0–4 | |
| 5 | 0 | 0–12 | 0 | 0–13 | 0 | 0–14 | 0 | 0–5 | 0 | 0–18 | 0 | 0–4 | |
| GFR1p-Stake | 2 | 48 | 31–66 | 81 | 62–91 | 35 | 19–55 | 55 | 44–66 | 17 | 6–39 | 48 | 38–58 |
| 3 | 45 | 28–62 | 85 | 66–94 | 91 | 73–98 | 72 | 61–81 | 39 | 20–61 | 66 | 56–74 | |
| 3.5 | 45 | 28–62 | 77 | 58–89 | 65 | 45–81 | 62 | 50–72 | 24 | 10–47 | 55 | 45–64 | |
| 4 | 55 | 38–72 | 58 | 39–74 | 52 | 33–71 | 55 | 44–66 | 6 | 1–26 | 46 | 36–56 | |
| 5 | 55 | 38–72 | 62 | 43–78 | 22 | 10–42 | 47 | 37–58 | 11 | 3–33 | 41 | 31–51 | |
| GFR1p-Jacobsson | 2 | 66 | 47–80 | 77 | 58–89 | 48 | 29–67 | 64 | 53–74 | 33 | 16–56 | 58 | 48–68 |
| 3 | 62 | 44–77 | 73 | 54–86 | 61 | 41–78 | 65 | 54–75 | 28 | 12–51 | 58 | 48–68 | |
| 3.5 | 76 | 58–88 | 77 | 58–89 | 61 | 41–78 | 72 | 61–81 | 29 | 13–53 | 64 | 54–73 | |
| 4 | 79 | 62–90 | 65 | 46–81 | 70 | 49–84 | 72 | 61–81 | 33 | 16–56 | 65 | 55–73 | |
| 5 | 86 | 69–95 | 77 | 58–89 | 70 | 49–84 | 78 | 68–86 | 44 | 25–66 | 72 | 62–80 | |
| GFR1p-Jacobsson-mod | 2 | 69 | 51–83 | 81 | 62–91 | 52 | 33–71 | 68 | 57–77 | 33 | 16–56 | 61 | 51–71 |
| 3 | 83 | 65–92 | 85 | 66–94 | 65 | 45–81 | 78 | 68–86 | 28 | 12–51 | 69 | 59–77 | |
| 3.5 | 79 | 62–90 | 77 | 58–89 | 61 | 41–78 | 73 | 62–82 | 29 | 13–53 | 65 | 55–74 | |
| 4 | 79 | 62–90 | 81 | 62–91 | 83 | 63–93 | 81 | 71–88 | 28 | 12–51 | 71 | 61–79 | |
| 5 | 72 | 54–85 | 96 | 81–99 | 74 | 54–87 | 81 | 71–88 | 44 | 25–66 | 74 | 64–82 | |
| GFR2p-Jødal-Brøchner-Mortensen | 2 and 5 | 90 | 74–96 | 100 | 87–100 | 100 | 86–100 | 96 | 89–99 | 100 | 82–100 | 97 | 91–99 |
CKD Chronic kidney disease; GFR glomerular filtration rate; CI confidence interval