A Case-Control Study on Risk Factors and Their Interactions with Prediabetes among the Elderly in Rural Communities of Yiyang City, Hunan Province

Table 5

Interactions of risk factors for prediabetes among the elderly in rural areas.

Factor 1	Factor 2	OR (95% CI)^†	RERI (95% CI)	AP (95% CI)	S (95% CI)
High WHR	Physical inactivity		6.30 (0.42, 12.18)	0.70 (0.50, 0.91)	4.84 (1.65, 17.85)
−	−	1.00
+	−	1.96 (1.23, 3.12)
−	+	1.68 (0.67, 4.23)
+	+	8.94 (4.08, 19.57)
High WHR	Overweight or obesity		2.92 (0.56, 5.29)	0.54 (0.28, 0.81)	3.02 (1.17, 7.46)
−	−	1.00
+	−	2.00 (1.22, 3.27)
−	+	1.45 (0.64, 3.28)
+	+	5.37 (3.05, 9.44)

†Adjusted for age, occupation, marital status, education, personal annual income, history of hyperglycaemia, sleep duration, family history of diabetes, smoking, alcohol intake, history of steroid drug use, health literacy on diabetes prevention and control, dietary patterns, hypertension, dyslipidaemia, and coronary heart disease, as well as the variables shown in the table. WHR: waist-to-hip ratio; RERI: relative excess risk due to interaction; AP: attributable proportion due to interaction; S: synergy index.