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209 Colonic manometry and contrast enemas 9 SUPPLEMENTAL FILE 1. Standardized colon size ratios presented as median (interquartile range) for a normative population of children (<6 years of age) who had undergone air contrast enemas for intussusception. Age group Overall ( n =119) <1 year ( n =25) 1 year ( n =36) 2 years ( n = n =40) 3 years ( n =10) 4 years ( n =4) 5 years ( n =4) P -value RS/L2 ( n =117) 10.18 (8.21-12.11) 9.81 (7.98-11.70) 9.75 (8.08-11.84) 10.24 (8.49-12.49) 11.23 (9.00-12.11) 10.27 (8.77-12.36) 9.59 (8.53-11.41) .31 7.17, 13.88 1 10.50 (±3.15) 2 Desc/L2 ( n =111) 5.03 (4.27-6.01) 4.63 (4.06-5.42) 5.40 (4.27-6.01) 4.86 (4.51-5.63) 5.38 (4.96-6.62) 6.80 (5.77-7.86) 5.95 (4.94-6.81) .05 3.83, 6.73 1 5.28 (±1.42) 2 RØ/L2 ( n =118) 1.53 (1.32-1.74) 1.27 (1.13-1.39) 1.50 (1.39-1.65) 1.56 (1.42-1.79) 1.74 (1.67-1.82) 1.75 (1.68-2.09) 1.75 (1.45-1.81) <.001 1.17, 1.84 1 1.52 (±0.27) 2 SØ/L2 ( n =118) 1.06 (0.96-1.22) 1.05 (0.98-1.10) 1.09 (0.97-1.23) 1.05 (0.93-1.32) 1.03 (0.94-1.2) 1.36 (1.19-1.52) 1.08 (0.99-1.28) .46 0.85, 1.42 1 1.10 (±0.21) 2 DØ/L2 ( n =119) 1.13 (1.01-1.29) 1.15 (1.04-1.29) 1.13 (1.03-1.27) 1.10 (0.95-1.32) 1.22 (1.01-1.3) 1.24 (1.17-1.31) 1.10 (0.97-1.22) .85 0.90, 1.47 1 1.17 (±0.24) 2 TØ/L2 ( n =113) 1.33 (1.22-1.48) 1.33 (1.18-1.51) 1.30 (1.20-1.44) 1.33 (1.22-1.52) 1.31 (1.22-1.42) 1.71 (1.58-1.87) 1.31 (0.89-1.41) .46 1.11, 1.69 1 1.36 (±0.22) 2 AØ/L2 ( n =111) 1.47 (1.31-1.6) 1.33 (1.22-1.5) 1.46 (1.32-1.59) 1.53 (1.35-1.65) 1.46 (1.27-1.58) 1.58 (1.45-1.86) 1.57 (1.50-1.71) .008 1.17, 1.81 1 1.48 (±0.26) 2 Republished from Koppen, I.J.N., Yacob, D., Di Lorenzo, C. et al. Pediatr Radiol 2017;47:306-312. doi:10.1007/s00247-016-3746-0 under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).