Table 2.

Validity of HG registration in MBRN using hospital records and less strict diagnostic criteria¹ (N = 550)²

	HG + in hospital record	HG – in hospital record	Total
HG + in MBRN	26	21	47
HG – in MBRN	5	498	503
Total	31	519	550
Sensitivity (26/31)	83.9%	95% CI: 67.4-92.9
Specificity (498/519)	96.0%	95% CI: 93.9-97.3
Positive predictive value (26/47)	55.3%	95% CI: 41.2-68.6
Negative predictive value (498/503)	99.0%	95% CI: 97.7-99.6

¹ Less strict diagnostic criteria indicate mild HG.

² One medical record went missing during the investigating period.