Table 2 Accuracy of video and non-video call–based estimations of respiratory conditions.

From: Video-call based newborn triage system for local birth centres can be established without major instalment costs using commercially available smartphones

 

Period 1

Period 2

Whole cohort

a Video call (−)

b Video call (+)

n = 525

n = 236

n = 136

n = 100

Risk estimation at referral

Estimated as clinically unstable

206

113

61

52

Requirement for respiratory support after admission

IPPV

69 (33.5%)

53 (46.9%)

31 (50.8%)

22 (42.3%)

IPPV or NIPPV

86 (41.7%)

61 (54.0%)

35 (57.4%)

26 (50.0%)

None

120 (58.3%)

52 (46.0%)

26 (42.6%)

26 (50.0%)

Estimated as clinically unstable

319

123

75

48

Requirement for respiratory support after admission

IPPV

22 (6.9%)

6 (4.9%)

2 (2.7%)

4 (8.3%)

IPPV or NIPPV

36 (11.3%)

12 (9.8%)

4 (5.3%)

8 (16.7%)

None

283 (88.7%)

111 (90.2%)

71 (94.7%)

40 (83.3%)

Accuracy of risk-estimation for infants requiring IPPV

Sensitivity

0.758 [0.670–0.846]

0.898 [0.821–0.975]

0.939 [0.858–1.021]

0.846 [0.707–0.985]

Specificity

0.684 [0.641–0.728]

0.661 [0.591–0.731]

0.709 [0.621–0.796]

0.595 [0.483–0.706]

False positive rate

0.316 [0.272–0.359]

0.339 [0.269–0.409]

0.291 [0.204–0.379]

0.405 [0.294–0.517]

False negative rate

0.242 [0.154–0.289]

0.102 [0.025–0.155]

0.061 [-0.021–0.115]

0.154 [0.015–0.256]

Positive likelihood ratio

2.402 [2.005–2.878]

2.650 [2.120–3.312]

3.225 [2.357–4.413]

2.087 [1.514–2.877]

Accuracy of risk-estimation for infants requiring IPPV or NIPPV

Sensitivity

0.705 [0.624–0.786]

0.836 [0.751–0.921]

0.897 [0.802–0.993]

0.765 [0.622–0.907]

Specificity

0.702 [0.658–0.747]

0.681 [0.609–0.753]

0.732 [0.644–0.820]

0.606 [0.488–0.724]

False positive rate

0.298 [0.253–0.342]

0.319 [0.247–0.391]

0.268 [0.180–0.356]

0.394 [0.276–0.512]

False negative rate

0.295 [0.214–0.345]

0.164 [0.079–0.230]

0.103 [0.007–0.171]

0.235 [0.093–0.355]

Positive likelihood ratio

2.367 [1.960–2.859]

2.619 [2.048–3.351]

3.348 [2.370–4.730]

1.941 [1.364–2.762]

  1. Values are number (%) or mean [95% confidence interval].
  2. Abbreviations: IPPV, invasive positive pressure ventilation; NIPPV, non-invasive positive-pressure ventilation.
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