Table 2. Open in new tab Clinician...

		Algorithmic concordance (% episodes) with clinician-assigned date ± buffer	Clinicians’ average confidence score (−1, 0, 1)	Standard deviation of clinicians’ confidence scores
Inferred start date of inferred pregnancy episode^a
Outcome	Live birth	93.8	98.8	100.0	0.56	0.52
Stillbirth	86.8	92.1	94.7	0.42	0.60
Abortion	85.2	92.6	96.3	0.04	0.84
Ectopic pregnancy	87.5	91.7	91.7	−0.04	0.89
No outcome	96.4	96.4	96.4	0.61	0.57
Inferred end date of inferred pregnancy episode (outcome only)
Outcome	Live birth	97.5	98.8	100.0	0.80	0.40
Stillbirth	100.0	100.0	100.0	0.61	0.55
Abortion	91.9	94.6	94.6	0.42	0.50
Ectopic pregnancy	90.9	90.9	90.9	0.48	0.62
Start date of recorded pregnancy episode
Outcome	Live birth	68.8	71.3	77.5	0.84	0.40
Stillbirth	68.4	78.9	84.2	0.79	0.41
Abortion	73.0	78.4	81.1	0.78	0.48
Ectopic pregnancy	97.0	100.0	100.0	0.88	0.33
No outcome	65.5	69.0	72.4	0.83	0.385
End date of recorded pregnancy episode
Outcome	Live birth	91.3	93.8	97.5	0.79	0.41
Stillbirth	84.2	86.8	89.5	0.68	0.57
Abortion	94.6	97.3	97.3	0.54	0.56
Ectopic pregnancy	78.8	81.8	93.9	0.52	0.62
No outcome		75.9	82.8	82.8	0.72	0.45

Algorithmic concordance (% episodes) with clinician-assigned date ± buffer

Clinicians’ average confidence score (−1, 0, 1)

Standard deviation of clinicians’ confidence scores

±7 days

±14 days

±21 days

Inferred start date of inferred pregnancy episode^a

Outcome

Live birth

93.8

98.8

100.0

0.56

0.52

Stillbirth

86.8

92.1

94.7

0.42

0.60

Abortion

85.2

92.6

96.3

0.04

0.84

Ectopic pregnancy

87.5

91.7

−0.04

0.89

No outcome

96.4

0.61

0.57

Inferred end date of inferred pregnancy episode (outcome only)

Outcome

Live birth

97.5

98.8

100.0

0.80

0.40

Stillbirth

100.0

0.61

0.55

Abortion

91.9

94.6

0.42

0.50

Ectopic pregnancy

90.9

0.48

0.62

Start date of recorded pregnancy episode

Outcome

Live birth

68.8

71.3

77.5

0.84

0.40

Stillbirth

68.4

78.9

84.2

0.79

0.41

Abortion

73.0

78.4

81.1

0.78

0.48

Ectopic pregnancy

97.0

100.0

0.88

0.33

No outcome

65.5

69.0

72.4

0.83

0.385

End date of recorded pregnancy episode

Outcome

Live birth

91.3

93.8

97.5

0.79

0.41

Stillbirth

84.2

86.8

89.5

0.68

0.57

Abortion

94.6

97.3

0.54

0.56

Ectopic pregnancy

78.8

81.8

93.9

0.52

0.62

No outcome

75.9

82.8

0.72

0.45

		Algorithmic concordance (% episodes) with clinician-assigned date ± buffer	Clinicians’ average confidence score (−1, 0, 1)	Standard deviation of clinicians’ confidence scores
Inferred start date of inferred pregnancy episode^a
Outcome	Live birth	93.8	98.8	100.0	0.56	0.52
Stillbirth	86.8	92.1	94.7	0.42	0.60
Abortion	85.2	92.6	96.3	0.04	0.84
Ectopic pregnancy	87.5	91.7	91.7	−0.04	0.89
No outcome	96.4	96.4	96.4	0.61	0.57
Inferred end date of inferred pregnancy episode (outcome only)
Outcome	Live birth	97.5	98.8	100.0	0.80	0.40
Stillbirth	100.0	100.0	100.0	0.61	0.55
Abortion	91.9	94.6	94.6	0.42	0.50
Ectopic pregnancy	90.9	90.9	90.9	0.48	0.62
Start date of recorded pregnancy episode
Outcome	Live birth	68.8	71.3	77.5	0.84	0.40
Stillbirth	68.4	78.9	84.2	0.79	0.41
Abortion	73.0	78.4	81.1	0.78	0.48
Ectopic pregnancy	97.0	100.0	100.0	0.88	0.33
No outcome	65.5	69.0	72.4	0.83	0.385
End date of recorded pregnancy episode
Outcome	Live birth	91.3	93.8	97.5	0.79	0.41
Stillbirth	84.2	86.8	89.5	0.68	0.57
Abortion	94.6	97.3	97.3	0.54	0.56
Ectopic pregnancy	78.8	81.8	93.9	0.52	0.62
No outcome		75.9	82.8	82.8	0.72	0.45

Table 2.

Open in new tab

Clinician validation of start and end dates of both inferred and recorded pregnancy episodes

		Algorithmic concordance (% episodes) with clinician-assigned date ± buffer			Clinicians’ average confidence score (−1, 0, 1)	Standard deviation of clinicians’ confidence scores
		±7 days	±14 days	±21 days		Standard deviation of clinicians’ confidence scores
Inferred start date of inferred pregnancy episode^a
Outcome	Live birth	93.8	98.8	100.0	0.56	0.52
	Stillbirth	86.8	92.1	94.7	0.42	0.60
	Abortion	85.2	92.6	96.3	0.04	0.84
	Ectopic pregnancy	87.5	91.7	91.7	−0.04	0.89
No outcome		96.4	96.4	96.4	0.61	0.57
Inferred end date of inferred pregnancy episode (outcome only)
Outcome	Live birth	97.5	98.8	100.0	0.80	0.40
	Stillbirth	100.0	100.0	100.0	0.61	0.55
	Abortion	91.9	94.6	94.6	0.42	0.50
	Ectopic pregnancy	90.9	90.9	90.9	0.48	0.62
Start date of recorded pregnancy episode
Outcome	Live birth	68.8	71.3	77.5	0.84	0.40
	Stillbirth	68.4	78.9	84.2	0.79	0.41
	Abortion	73.0	78.4	81.1	0.78	0.48
	Ectopic pregnancy	97.0	100.0	100.0	0.88	0.33
No outcome		65.5	69.0	72.4	0.83	0.385
End date of recorded pregnancy episode
Outcome	Live birth	91.3	93.8	97.5	0.79	0.41
	Stillbirth	84.2	86.8	89.5	0.68	0.57
	Abortion	94.6	97.3	97.3	0.54	0.56
	Ectopic pregnancy	78.8	81.8	93.9	0.52	0.62
No outcome		75.9	82.8	82.8	0.72	0.45

		Algorithmic concordance (% episodes) with clinician-assigned date ± buffer			Clinicians’ average confidence score (−1, 0, 1)	Standard deviation of clinicians’ confidence scores
		±7 days	±14 days	±21 days		Standard deviation of clinicians’ confidence scores
Inferred start date of inferred pregnancy episode^a
Outcome	Live birth	93.8	98.8	100.0	0.56	0.52
	Stillbirth	86.8	92.1	94.7	0.42	0.60
	Abortion	85.2	92.6	96.3	0.04	0.84
	Ectopic pregnancy	87.5	91.7	91.7	−0.04	0.89
No outcome		96.4	96.4	96.4	0.61	0.57
Inferred end date of inferred pregnancy episode (outcome only)
Outcome	Live birth	97.5	98.8	100.0	0.80	0.40
	Stillbirth	100.0	100.0	100.0	0.61	0.55
	Abortion	91.9	94.6	94.6	0.42	0.50
	Ectopic pregnancy	90.9	90.9	90.9	0.48	0.62
Start date of recorded pregnancy episode
Outcome	Live birth	68.8	71.3	77.5	0.84	0.40
	Stillbirth	68.4	78.9	84.2	0.79	0.41
	Abortion	73.0	78.4	81.1	0.78	0.48
	Ectopic pregnancy	97.0	100.0	100.0	0.88	0.33
No outcome		65.5	69.0	72.4	0.83	0.385
End date of recorded pregnancy episode
Outcome	Live birth	91.3	93.8	97.5	0.79	0.41
	Stillbirth	84.2	86.8	89.5	0.68	0.57
	Abortion	94.6	97.3	97.3	0.54	0.56
	Ectopic pregnancy	78.8	81.8	93.9	0.52	0.62
No outcome		75.9	82.8	82.8	0.72	0.45

As these cases were randomly selected for clinician validation, they do not reveal information about the subpopulation and are not subject to the same policy regarding masking small numbers of patients.

Not all episodes have ascertainable start dates.

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