Table 2.

Events before and after parathyroidectomy

OutcomeBefore Parathyroidectomy (n=4435)After Parathyroidectomy (n=4435)Rate Ratio
Patients with Event, nEvents, nPercent (95% CI)Rate per 100 Patient-Years (95% CI)Patients with Event, nEvents, nMedian Follow-Up, yrPercent (95% CI)Rate per 100 Patient-Years (95% CI)After versus Before (95% CI)
30-Day outcomes
 Hospitalization105712510.0823.8 (22.6 to 25.1)344.4 (325.2 to 363.6)
 ICU stay3673670.088.3 (7.5 to 9.1)105.8 (93.6 to 115.2)
 Hospital days105762590.0823.8 (22.6 to 25.1)1724.4 (1681 to 1768)
1-Year outcomes
 Hospitalization2477614755.9 (54.4 to 57.3)138.6 (135.1 to 142.1)283275711.063.9 (62.4 to 65.3)192.0 (187.7 to 196.3)1.39 (1.34 to 1.44)
 ICU stay required997168022.5 (21.3 to 23.7)37.9 (36.1 to 39.7)141525241.031.9 (30.5 to 33.3)64.0 (61.5 to 66.5)1.69 (1.59 to 1.80)
 Total hospital days247735,004789.3 (781.0 to 797.5)283249,0961.01245.0 (1234 to 1256)1.58 (1.56 to 1.60)
Cause-specific hospitalization
 CHF3915688.8 (8.0 to 9.7)12.8 (11.8 to 13.9)3074531.06.9 (6.2 to 7.7)11.5 (10.4 to 12.5)0.90 (0.80 to 1.02)
 CVA/TIA67761.5 (1.2 to 1.9)1.7 (1.3 to 2.1)1011241.02.3 (1.8 to 2.7)3.1 (2.6 to 3.7)1.83 (1.38 to 2.43)
 Dysrhythmia1141502.6 (2.1 to 3.0)3.4 (2.8 to 3.9)1541921.03.5 (2.9 to 4.0)4.9 (4.2 to 5.6)1.44 (1.16 to 1.78)
 AMI1021302.3 (1.9 to 2.7)2.9 (2.4 to 3.4)1742291.03.9 (3.4 to 4.5)5.8 (5.1 to 6.6)1.98 (1.60 to 2.46)
 With hypocalcemia83981.9 (1.5 to 2.3)2.2 (1.8 to 2.6)94214861.021.2 (20.0 to 22.4)37.7 (35.8 to 39.6)17.05 (13.90 to 20.92)
Total outpatient visits
 Total ED/observation330913,94174.6 (73.3 to 75.9)314.3 (309.1 to 319.6)340814,9161.076.8 (75.6 to 78.1)378.3 (372.2 to 384.3)1.20 (1.17 to 1.23)
 ED/observation with hypocalcemia841061.9 (1.5 to 2.3)2.4 (1.9 to 2.8)107219261.024.2 (22.8 to 25.4)48.8 (46.7 to 51.0)20.44 (16.81 to 24.85)
 Outpatient/physician with hypocalcemia30310.7 (0.4 to 0.9)0.7 (0.5 to 0.9)2344691.05.3 (4.6 to 5.9)11.9 (10.8 to 13.0)17.02 (11.83 to 24.48)
  • ICU, intensive care unit; CHF, congestive heart failur; AMI, acute myocardial infarction; ED, emergency department; 95% CI, 95% confidence interval.