Table 3:

Sensitivity and specificity of specific cutpoints for detection of cardiac enlargement

CutpointSensitivity, % (95% CI)Specificity, % (95% CI)Positive likelihood ratio (95% CI)Negative likelihood ratio (95% CI)
PA-CXR
CTR for men and women (n = 101)
 0.4588 (77–95)40 (25–56)1.45 (1.12–1.89)0.31 (0.14–0.67)
 0.5072 (59–83)72 (56–85)2.59 (1.56–4.30)0.38 (0.24–0.60)
 0.6024 (14–37)95 (84–99)5.19 (1.24–21.60)0.80 (0.68–0.93)
Maximum heart diameter for men, cm (n = 55)
 1586 (70–95)60 (36–81)2.14 (1.23–3.73)0.24 (0.10–0.58)
 1929 (15–46)100 (83–100)Infinity0.71 (0.58–0.88)
Maximum heart diameter for women, cm (n = 46)
 1391 (72–99)57 (35–77)2.10 (1.30–3.40)0.15 (0.04–0.61)
 1730 (13–53)91 (72–99)3.50 (0.81–15.10)0.76 (0.57–1.00)
AP-CXR
CTR for men and women (n = 51)
 0.4597 (85–100)0 (0–21)0.97 (0.92–1.00)Infinity
 0.5089 (73–97)38 (15–65)1.42 (0.95–2.11)0.31 (0.10–0.93)
 0.6049 (31–66)94 (70–100)7.77 (1.13–53.40)0.55 (0.39–0.78)
Maximum heart diameter for men, cm (n = 26)
 1590 (67–99)29 (4–71)1.25 (0.77–2.05)0.37 (0.06–2.1)
 1942 (20–67)100 (59–100)Infinity0.58 (0.40–0.85)
Maximum heart diameter for women, cm (n = 25)
 13100 (79–100)11 (0–48)1.13 (0.89–1.42)0 (0)
 1750 (25–75)89 (52–100)4.50 (0.67–30.40)0.56 (0.33–0.97)
  • Note: AP = anteroposterior, CI = confidence interval, CTR = cardiothoracic ratio, CXR = chest radiography, PA = posteroanterior.