Sensitivity and specificity of specific cutpoints for detection of left ventricular enlargement
| Cutpoint | Sensitivity, % (95% CI) | Specificity, % (95% CI) | Positive likelihood ratio (95% CI) | Negative likelihood ratio (95 CI%) |
|---|---|---|---|---|
| PA-CXR | ||||
| CTR for men and women (n = 101) | ||||
| 0.45 | 96 (79–100) | 30 (20–41) | 1.37 (1.16–1.62) | 0.14 (0.02–0.98) |
| 0.50 | 79 (58–93) | 55 (43–66) | 1.74 (1.27–2.40) | 0.38 (0.17–0.86) |
| 0.60 | 17 (5–37) | 84 (74–92) | 1.07 (0.38–3.01) | 0.99 (0.81–1.21) |
| Maximum heart diameter for men, cm (n = 55) | ||||
| 15 | 94 (73–100) | 43 (27–61) | 1.66 (1.23–2.25) | 0.13 (0.02–0.89) |
| 19 | 28 (10–54) | 87 (71–96) | 2.06 (0.68–6.20) | 0.84 (0.61–1.14) |
| Maximum heart diameter for women, cm (n = 46) | ||||
| 13 | 100 (54–100) | 38 (23–54) | 1.60 (1.26–2.03) | 0 (0) |
| 17 | 33 (4–78) | 83 (67–93) | 1.90 (0.51–7.11) | 0.81 (0.45–1.45) |
| AP-CXR | ||||
| CTR for men and women (n = 51) | ||||
| 0.45 | 94 (70–100) | 20 (8–37) | 0.94 (0.83–1.06) | 0.30 (0–3.80) |
| 0.50 | 88 (62–98) | 23 (10–40) | 1.13 (0.88–1.47) | 0.55 (0.13–2.29) |
| 0.60 | 50 (25–75) | 71 (54–85) | 1.75 (0.85–3.59) | 0.70 (0.41–1.19) |
| Maximum heart diameter for men, cm (n = 26) | ||||
| 15 | 88 (47–100) | 17 (4–41) | 1.05 (0.75–1.47) | 0.75 (0.09–6.15) |
| 19 | 38 (9–76) | 72 (47–90) | 1.35 (0.42–4.32) | 0.87 (0.47–1.59) |
| Maximum heart diameter for women, cm (n = 25) | ||||
| 13 | 100 (63–100) | 6 (0–29) | 1.06 (0.94–1.20) | 0 (0) |
| 17 | 50 (16–84) | 71 (44–90) | 1.70 (0.62–4.67) | 0.71 (0.33–1.51) |
Note: AP = anteroposterior, CI = confidence interval, CTR = cardiothoracic ratio, CXR = chest radiography, PA = posteroanterior.