Table 5.
Age at disease onset in the rheumatoid arthritis (RA) patient cohort.
| Normal Weight | Overweight | Obese | Underweight | ||||
|---|---|---|---|---|---|---|---|
| (n = 1505) | (n = 1024) | p | (n = 546) | p | (n = 142) | p | |
| Age at first symptoms, years (mean (SD)) | 43.90 (15.46) | 48.42 (13.98) | <0.001 | 48.52 (12.59) | <0.001 | 37.78 (16.68) | <0.001 |
| Missing | 34 (2.26) | 39 (3.81) | 21 (3.85) | 7 (4.93) | |||
| Age at diagnosis, years (mean (SD)) | 45.36 (15.31) | 50.10 (13.71) | <0.001 | 49.95 (12.67) | <0.001 | 39.86 (16.87) | <0.001 |
| Missing | 34 (2.26) | 33 (3.22) | 19 (3.48) | 8 (5.63) |
Values are the number and column percentages, unless otherwise specified. The underweight, overweight, and obese categories were compared to the normal weight group using t-test. For the test, the missing values did not function as a grouping variable. Abbreviations: n—sample size; SD—standard deviation.