Table 1.
Characteristics of the Total Enrolled Study Sample (n = 1238) and a Subsample with Oral Glucose Tolerance Test (n = 155) Results
| Variable | Total Study Sample | Subsample with OGTT Results | P-value* |
|---|---|---|---|
| (n = 1238), % (n) | (n = 155), % (n) | ||
| Sex | |||
| Male | 49.9 (618) | 57.4 (89) | 0.062 |
| Female | 50.1 (620) | 42.6 (66) | 0.041 |
| Age (years) | |||
| Mean (SD) | 43.0 (11.2) | 42.1 (9.6) | 0.262† |
| ≤34 | 25.1 (311) | 25.8 (40) | 0.839 |
| 35–44 | 27.3 (338) | 33.6 (52) | 0.081 |
| 45–54 | 31.0 (384) | 30.3 (47) | 0.855 |
| ≥55 | 16.6 (205) | 10.3 (16) | 0.036 |
| BMI (kg/m2) | |||
| Mean (SD) | 29.2 (6.0) | 29.3 (5.2) | 0.889† |
| Underweight | 1.5 (18) | 1.3 (2) | 0.868 |
| Normal weight | 17.8 (221) | 16.8 (26) | 0.727 |
| Overweight | 43.6 (540) | 42.6 (66) | 0.794 |
| Obese | 37.1 (459) | 39.3 (61) | 0.558 |
Notes: *Two-sided one-sample binomial tests were used to determine if statistical differences were present when comparing proportions of characteristics of the subsample who underwent OGTT with their respective proportions in the total study sample; †calculated using one-sample t-tests to compare means of age and body mass index variables in the subsample who underwent oral glucose tolerance test to their respective means in the total study sample.
Abbreviations: BMI, Body mass index; SD, standard deviation; OGTT, oral glucose tolerance test.