Test characteristics of varying respiratory rates (RRs) by age group among all children and those without wheezing*
| RR | Patients with RR above threshold, n | Patients with radiographic pneumonia, n | Sensitivity | Specificity | Positive likelihood ratio (95% CI) | Negative likelihood ratio (95% CI) |
| All children | ||||||
| Age <2 months (n=1073) | ||||||
| RR >60 | 650 | 104 | 0.60 | 0.39 | 0.98 (0.86 to 1.12) | 1.03 (0.84 to 1.25) |
| RR >65 | 357 | 63 | 0.36 | 0.67 | 1.11 (0.89 to 1.38) | 0.95 (0.84 to 1.07) |
| RR >70 | 182 | 30 | 0.17 | 0.83 | 1.02 (0.71 to 1.46) | 1.00 (0.93 to 1.07) |
| Age 2–11 months (n=7145) | ||||||
| RR >50 | 5986 | 1187 | 0.85 | 0.17 | 1.02 (1.00 to 1.05) | 0.89 (0.77 to 1.02) |
| RR >55 | 4926 | 982 | 0.71 | 0.31 | 1.03 (0.99 to 1.07) | 0.94 (0.86 to 1.03) |
| RR >60 | 3717 | 772 | 0.55 | 0.49 | 1.08 (1.03 to 1.14) | 0.91 (0.86 to 0.97) |
| Age 12–59 months (n=4260) | ||||||
| RR >40 | 3140 | 715 | 0.74 | 0.26 | 1.00 (0.96 to 1.04) | 1.00 (0.89 to 1.13) |
| RR >45 | 2685 | 603 | 0.62 | 0.37 | 0.98 (0.93 to 1.04) | 1.03 (0.94 to 1.13) |
| RR >50 | 2268 | 499 | 0.51 | 0.46 | 0.96 (0.89 to 1.02) | 1.05 (0.98 to 1.13) |
| Children without wheezing | ||||||
| Age <2 months (n=937) | ||||||
| RR >60 | 570 | 85 | 0.60 | 0.39 | 0.99 (0.86 to 1.14) | 1.02 (0.81 to 1.27) |
| RR >65 | 318 | 54 | 0.38 | 0.67 | 1.15 (0.92 to 1.46) | 0.92 (0.80 to 1.06) |
| RR >70 | 162 | 26 | 0.18 | 0.83 | 1.08 (0.74 to 1.58) | 0.98 (0.90 to 1.07) |
| Age 2–11 months (n=5340) | ||||||
| RR >50 | 4449 | 886 | 0.84 | 0.17 | 1.01 (0.99 to 1.04) | 0.93 (0.79 to 1.08) |
| RR >55 | 3650 | 730 | 0.69 | 0.32 | 1.02 (0.97 to 1.07) | 0.96 (0.86 to 1.06) |
| RR >60 | 2731 | 571 | 0.54 | 0.50 | 1.08 (1.01 to 1.15) | 0.92 (0.86 to 0.99) |
| Age 12–59 months (n=3225) | ||||||
| RR >40 | 2270 | 540 | 0.70 | 0.29 | 0.98 (0.93 to 1.04) | 1.04 (0.92 to 1.17) |
| RR >45 | 1937 | 449 | 0.58 | 0.39 | 0.95 (0.89 to 1.02) | 1.07 (0.98 to 1.18) |
| RR >50 | 1612 | 368 | 0.47 | 0.49 | 0.93 (0.86 to 1.02) | 1.07 (0.99 to 1.16) |
Bold values are statistically significant.
*182 missing values for RR were excluded from the analysis.