Table 1 General characteristics of the study sample (n = 33,919)
From: The predictive effect of body mass index on type 2 diabetes in the Norwegian women and cancer study
Baseline cohort N = 33,919 | Incident T2D cases | Prevalent T2D cases | ||||
|---|---|---|---|---|---|---|
N (%) | Mean (SD) | N (%) | Mean (SD) | N (%) | Mean (SD) | |
Age (years) | 47.7 (4.3) | 48.9 (4.3) | 50.3 (3.9) | |||
40-44 | 9926 (29.3) | 70 (21.4) | 25 (12.3) | |||
45-49 | 11382 (33.6) | 98 (30.0) | 43 (21.1) | |||
50-54 | 10849 (32.0) | 137 (41.9) | 107 (52.5) | |||
55-59 | 1762 (5.2) | 22 (6.7) | 29 (14.2) | |||
BMI*ठ| 24.4 (3.8) | 29.7 (5.4) | 29.8 (6.3) | |||
Normal weight (<25 kg/m2) | 21553 (64.6) | 55 (17.6) | 47 (23.4) | |||
Overweight (25–29.9 kg/m2) | 9106 (27.3) | 126 (40.3) | 64 (31.8) | |||
Obese (≥30 kg/m2) | 2709 (8.1) | 132 (42.2) | 90 (44.8) | |||
Education level (duration in years)*ठ| 12.5 (3.2) | 11.7 (3.1) | 11.4 (2.9) | |||
Primary/Intermediate (0–9) | 6736 (20.1) | 91 (27.9) | 63 (31.2) | |||
Secondary (10-12) | 12102 (36.1) | 125 (38.3) | 83 41.1) | |||
University (13-16) | 10226 (30.5) | 88 (27.0) | 36 (17.8) | |||
Postgraduate and above (17+) | 4460 (13.3) | 22 (6.7) | 20 (9.9) | |||
Physical activity level*ठ| 5.6 (1.7) | 4.7 (1.8) | 4.9 (1.9) | |||
Low | 3686 (11.5) | 76 (25.5) | 41 (21.4) | |||
Medium | 24229 (75.5) | 200 (67.1) | 133 (69.3) | |||
High | 4186 (13.0) | 22 (7.4) | 18 (9.4) | |||
Smoking status | ||||||
Never smoker | 13763 (40.6) | 124 (37.9) | 71 (34.8) | |||
Former smoker | 10582 (31.2) | 106 (32.4) | 70 (34.3) | |||
Current smoker | 9574 (28.2) | 97 (29.7) | 63 (30.9) | |||
Age at diagnosis (years) | 53.1 (4.5) | 46.3 (4.2) | ||||
40-44 | 10 (3.1) | 75 (36.8) | ||||
45-49 | 69 (21.1) | 70 (34.3) | ||||
50-54 | 107 (32.7) | 59 (28.9) | ||||
55-59 | 117 (35.8) | 0 (0.0) | ||||
60-64 | 24 (7.3) | 0 (0.0) | ||||