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Table 4 Test-retest reliability, interrater and intrarater agreement for individual mid-ventricular myocardial segments

From: The reliability and feasibility of non-contrast adenosine stress cardiovascular magnetic resonance T1 mapping in patients on haemodialysis

Parameter Study 1 Study 2 CoV ICC (95% CI) Bias ± SD of bias BA Limits of Agreement
Rest native T1 test-retest reliability (n = 10)
 S1 1257 ± 56 1230 ± 56 2.6% 0.37 (−0.23–0.79) 26.1 ± 62.3 − 96.0; 148.2
 S2 1232 ± 39 1226 ± 42 1.3% 0.69 (0.14–0.91) 5.4 ± 32.8 − 58.9; 69.7
 S3* 1241 ± 38 1233 ± 33 1.2% 0.66 (0.08–0.91) 8.8 ± 29.4 48.8; 66.4
 S4 1275 ± 57 1268 ± 48 2.0% 0.51 (− 0.17–0.85) 7.3 ± 53.2 − 96.9; 111.5
 S5 1292 ± 50 1291 ± 44 0.9% 0.87 (0.54–0.97) 1.2 ± 26.7 − 49.1; 51.5
 S6 1303 ± 54 1282 ± 47 2.4% 0.27 (− 0.37–0.74) 20.7 ± 61.2 − 99.2; 140.6
Stress native T1 test-retest reliability (n = 9)
 S1** 1300 ± 43 1269 ± 40 2.2% 0.24 (− 0.31–0.75) 31.5 ± 49.8 −66.1; 129.1
 S2** 1266 ± 46 1229 ± 69 3.7% − 0.19 (0.74–0.54) 37.0 ± 90.8 − 141.0; 215.0
 S3 1298 ± 68 1262 ± 31 2.8% 0.19 (0.36–0.71) 35.7 ± 66.5 −94.8; 166.1
 S4 1322 ± 56 1304 ± 86 3.0% 0.41 (− 0.33–0.83) 17.4 ± 80.4 −140.1; 175.0
 S5 1326 ± 40 1345 ± 76 2.3% 0.50 (− 0.17–0.86) −18.2 ± 61.1 − 138.0; 101.6
 S6 1353 ± 53 1337 ± 41 1.8% 0.48 (− 0.18–0.85) 15.9 ± 47.9 −78.1; 109.8
Rest native T1 interrater agreement (n = 15)
 S1 1259 ± 47 1257 ± 46 0.4% 0.98 (0.94–0.99) 1.8 ± 9.4 − 16.6; 20.2
 S2 1238 ± 33 1240 ± 33 0.7% 0.86 (0.67–0.96) 1.6 ± 17.0 − 34.8; 31.6
 S3 1237 ± 37 1237 ± 30 0.4% 0.96 (0.89–0.99) −0.6 ± 9.9 − 20.0; 18.8
 S4 1269 ± 50 1273 ± 51 0.4% 0.98 (0.94–1.00) − 4.5 ± 8.4 − 21.0; 12.1
 S5 1294 ± 42 1296 ± 38 0.3% 0.98 (0.94–0.99) −2.2 ± 8.3 − 18.4; 14.0
 S6 1300 ± 44 1301 ± 42 0.4% 0.97 (0.91–0.99) −1.1 ± 11.4 − 23.4; 21.2
Stress native T1 interrater agreement (n = 15)
 S1 1307 ± 52 1304 ± 66 1.0% 0.91 (0.76–0.97) 2.9 ± 25.7 − 47.5; 53.4
 S2 1280 ± 57 1283 ± 57 0.4% 0.99 (0.96–1.00) −2.8 ± 9.8 −22.0; 16.4
 S3 1291 ± 59 1296 ± 64 0.5% 0.98 (0.93–0.99) − 5.3 ± 12.2 −29.1; 18.6
 S4 1312 ± 57 1316 ± 59 0.3% 0.99 (0.96–1.00) −4.2 ± 8.4 −20.7; 12.3
 S5 1329 ± 47 1326 ± 41 0.3% 0.98 (0.94–0.99) 3.2 ± 8.8 − 14.0; 20.4
 S6 1339 ± 49 1344 ± 49 0.4% 0.97 (0.92–0.99) −5.0 ± 10.3 − 25.2; 15.2
ΔT1 interrater agreement (n = 15)
 S1 3.8 ± 2.8 3.7 ± 3.1 29.8% 0.72 (0.34–0.90) 0.1 ± 2.3 −4.4; 4.6
 S2 3.4 ± 3.7 3.5 ± 3.2 24.4% 0.88 (0.68–0.96) − 0.1 ± 1.8 − 3.5; 3.4
 S3 4.4 ± 3.7 4.7 ± 4.2 10.1% 0.97 (0.92–0.99) − 0.4 ± 0.9 − 2.1; 1.4
 S4 3.4 ± 2.1 3.4 ± 2.7 12.5% 0.94 (0.83–0.98) 0.0 ± 0.9 − 1.7; 1.7
 S5 2.7 ± 2.0 2.3 ± 1.7 14.0% 0.93 (0.71–0.98) 0.4 ± 0.6 − 0.7; 1.6
 S6 3.1 ± 2.0 3.4 ± 1.7 12.5% 0.91 (0.76–0.97) −0.3 ± 0.8 − 1.8; 1.2
Rest native T1 intrarater agreement (n = 15)
 S1 1259 ± 47 1257 ± 49 0.3% 0.99 (0.97–1.00) 2.1 ± 7.0 − 11.6; 15.9
 S2 1238 ± 33 1238 ± 36 0.3% 0.98 (0.95–0.99) 0.3 ± 6.4 − 12.3; 12.9
 S3 1237 ± 37 1235 ± 34 0.3% 0.98 (0.95–0.99) 1.4 ± 6.5 −11.4; 14.2
 S4 1269 ± 50 1274 ± 46 0.5% 0.97 (0.91–0.99) − 4.7 ± 11.0 −26.3; 16.8
 S5 1294 ± 42 1298 ± 41 0.4% 0.97 (0.92–0.99) −4.1 ± 8.9 −21.5; 13.4
 S6 1300 ± 44 1295 ± 40 0.4% 0.96 (0.90–0.99) 4.4 ± 10.8 − 16.8; 25.6
Stress native T1 intrarater agreement (n = 15)
 S1 1307 ± 52 1306 ± 68 0.9% 0.93 (0.79–0.98) 0.7 ± 24.2 −46.7; 48.1
 S2 1280 ± 57 1280 ± 59 0.3% 0.99 (0.97–1.00) 0.5 ± 9.2 −17.6; 18.6
 S3 1291 ± 59 1294 ± 61 0.3% 0.99 (0.98–1.00) − 3.2 ± 6.5 − 15.9; 9.5
 S4 1312 ± 57 1317 ± 58 0.5% 0.97 (0.92–0.99) −5.5 ± 12.5 −30.0; 19.1
 S5 1329 ± 47 1328 ± 39 0.5% 0.95 (0.86–0.98) 1.1 ± 14.0 − 26.3; 28.6
 S6 1339 ± 49 1342 ± 50 0.4% 0.97 (0.92–0.99) −2.4 ± 11.9 − 25.6; 20.8
ΔT1 intrarater agreement (n = 15)
 S1 3.8 ± 2.8 3.9 ± 2.8 22.5% 0.84 (0.59–0.94) − 0.1 ± 1.8 − 3.6; 3.4
 S2 3.4 ± 3.7 3.4 ± 3.4 12.3% 0.97 (0.92–0.99) 0.0 ± 0.9 − 1.7; 1.7
 S3 4.4 ± 3.7 4.7 ± 3.7 9.6% 0.97 (0.92–0.99) −0.4 ± 0.8 − 2.0; 1.3
 S4 3.4 ± 2.1 3.4 ± 1.8 10.7% 0.93 (0.81–0.98) 0.0 ± 0.8 −1.5; 1.5
 S5 2.7 ± 2.0 2.3 ± 1.8 20.1% 0.86 (0.63–0.95) 0.4 ± 1.0 −1.5; 2.3
 S6 3.1 ± 2.0 3.6 ± 2.5 23.1% 0.76 (0.47–0.92) − 0.5 ± 1.5 −3.5; 2.4
  1. Data presented as mean ± SD. *n = 9; **n = 8. CoV Coefficient of variability, ICC Intraclass correlation coefficient, BA Bland-Altman
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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