Table 3. Daily ambient erythemal UVR and DALY rates of cataracts in altitude groups.

Altitude group	Average altitude	UVR (J/m2) Median	P	DALYs/100 000 Median
				Totald	0–64d	65–74d	≥75d	Agrd	N-Agrd
1	≥4000	4763	0.036a	291	137.5	1662	4218.5	298.5	397.5
2	500–2000	3026	0.085b	164	61	1126	1782	188	102
3	≤500	2715	0.009c	141	42	652	1137.5	157	74

Agr, agricultural population; DALY, disability-adjusted life years; N-Agr, non-agricultural population; UVR, ultraviolet radiation.

^aPairwise comparison between group 1 and 2.

^bPairwise comparison between group 2 and 3.

^cPairwise comparison between group 1 and 3.

^dNo statistical significance among the 3 altitude groups; no pairwise comparison required.