Table 2.

Cross‐classification of obesity at the first and last examinations

Obesity at First Exam		Obesity at Final Examination
		Yes	No	Sum	Classification Statistics
Yes		194 953	78 305	273 258	Relative Risk: 7.7 (7.72, 7.73)a
No		162 871	1 599 886	1 762 757	Positive Predictive Value: 71.3% (71.2, 71.5)
Sum		357 824	1 678 191	2 036 015	Sensitivity: 54.5% (54.3, 54.6)
					Specificity: 95.3% (95.3, 95.4)

Values are estimate (95% confidence interval).