Performance of mid-arm circumference and chest circumference in identifying low birthweight newborns (<2500 g)
| Indicator | Cut off point (cm) | % Below cut off point | Sensitivity | Specificity | Positive predictive value | Negative predictive value |
| MAC | 8.5 | 51 | 81.5 (68.1, 90.3) | 52.0 (47.7, 56.2) | 14.1 (10.5, 18.5) | 96.7 (93.8, 98.3) |
| 8.0 | 37.2 | 81.5 (68.1, 90.3) | 67.0 (62.9, 70.8) | 19.2 (14.4, 25.0) | 97.4 (95.1, 98.7) | |
| 7.5 | 10.7 | 63.0 (48.7, 75.4) | 94.3 (91.9, 96.0) | 51.5 (39.0, 63.9) | 96.4 (94.3, 97.7) | |
| 7.0 | 9.8 | 63.0 (48.7, 75.4) | 95.4 (93.2, 96.9) | 56.7 (43.3, 69.2) | 96.4 (94.4, 97.7) | |
| CC | 32.5 | 29 | 87 (74.9, 94.2) | 76.7 (72.8, 80.0) | 26.4 (20.2, 33.6) | 98.4 (96.6, 99.3) |
| 31.5 | 12.4 | 59.3 (45.1, 72.1) | 92.1 (89.5, 94.2) | 42.1 (31.0, 54.0) | 95.9 (93.8, 97.4) | |
| 30.5 | 11.2 | 59.3 (45.1, 72.1) | 93.4 (90.9, 95.2) | 46.4 (34.4, 58.7) | 96.0 (93.9, 97.4) | |
| 29.5 | 2.8 | 13 (5.8, 25.5) | 98.2 (96.7, 99.1) | 41.2 (19.4, 66.5) | 92.2 (89.7, 94.2) |
95% Confidence intervals shown in parentheses.