Table 3.

Age-period-cohort analysis of the newly reported HIV infections among the older adults in Zhejiang Province.

	χ2 (df)	P value
Net drift=0	132.490 (1)	＜.001
All age deviations=0	26.946 (5)	＜.001
All period deviations=0	60.887 (2)	＜.001
All cohort deviations=0	3.537 (8)	.90
All period RRa=1	161.170 (3)	＜.001
All cohort RR=1	234.936 (9)	＜.001
All local drifts=net drift	3.485 (7)	.84

^aRR: relative risk.