Table 3

Crude incidence proportions and incidence densities by type of diabetes and hypoglycemia event

 All respondents T1DM T2DM
 n=552 n=94 n=456
Total hypoglycemia
 Overall
  Incidence proportion, % (95% CI)65.2 (61.0 to 69.0)83.0 (74.1 to 89.2)62.0 (56.9 to 65.8)
  Incidence density, events PPY (95% CI)35.1 (34.6 to 35.6)58.1 (56.6 to 59.7)30.4 (29.9 to 30.9)
 Daytime
  Incidence proportion, % (95% CI)65.5 (58.2 to 66.3)80.0 (70.6 to 86.7)59.0 (54.2 to 63.2)
  Incidence density, events PPY (95% CI)22.7 (22.2 to 23.0)43.4 (42.0 to 44.7)18.3 (17.9 to 18.7)
 Nocturnal
  Incidence proportion, % (95% CI)41.1 (36.9 to 45.1)63.0 (52.7 to 71.9)36.7 (32.1 to 40.9)
  Incidence density, events PPY (95% CI)12.6 (12.3 to 12.9)14.7 (14.0 to 15.5)12.1 (11.8 to 12.4)
Non-severe hypoglycemia
 Overall
  Incidence proportion, % (95% CI)58.2 (53.8 to 62.0)77.0 (67.1 to 84.0)54.0 (49.6 to 58.7)
  Incidence density, events PPY (95% CI)32.7 (32.2 to 33.2)55.7 (54.2 to 57.2)28.0 (27.5 to 28.4)
 Daytime
  Incidence proportion, % (95% CI)55.4 (51.3 to 59.6)74.5 (64.8 to 82.2)52.0 (47.0 to 56.1)
  Incidence density, events PPY (95% CI)21.0 (20.7 to 21.5)41.8 (40.5 to 43.1)16.8 (16.4 to 17.2)
 Nocturnal
  Incidence proportion, % (95% CI)33.9 (30.0 to 37.9)54 (44.2 to 64.0)29.7 (25.6 to 34.0)
  Incidence density, events PPY (95% CI)11.6 (11.3 to 11.9)13.9 (13.2 to 14.7)11.1 (10.8 to 11.4)
Severe hypoglycemia
 Overall
  Incidence proportion, % (95% CI)40.4 (36.5 to 44.7)54.3 (44.2 to 64.0)38.0 (33.4 to 42.3)
  Incidence density, events PPY (95% CI)2.5 (2.3 to 2.6)2.4 (2.1 to 2.8)2.5 (2.3 to 2.6)
 Daytime
  Incidence proportion, % (95% CI)38.2 (34.0 to 42.1)52.1 (42.2 to 61.9)35.1 (30.9 to 39.6)
  Incidence density, events PPY (95% CI)1.5 (1.4 to 1.6)1.6 (1.4 to 1.9)1.5 (1.4 to 1.6)
 Nocturnal
  Incidence proportion, % (95% CI)27.2 (23.4 to 30.8)34.0 (25.3 to 44.1)25.4 (21.7 to 29.6)
  Incidence density, events PPY (95% CI)1.0 (0.9 to 1.0)0.8 (0.6 to 1.0)1.0 (0.9 to 1.1)
  • Incidence proportion refers to 30-day incidence for non-severe hypoglycemia and 1-year incidence for severe hypoglycemia.

  • PPY, per person-year; T1DM, type 1 diabetes mellitus; T2DM, type 2 diabetes mellitus.