From: Novel use of three administrative datasets to establish a cohort for environmental health research
NZ resident population* 7 March 2006 | Match rate | NHI overcount rate ratio | |||
---|---|---|---|---|---|
NHI | Cohort | Cohort NHI | Poisson regression all variables, 95% CI | ||
Total | 4,076,824 | 3,838,119 | 0.70 | ||
Sex | |||||
Male | 1,939,949 | 1,335,200 | 0.69 | Reference | |
Female | 2,136,875 | 1,506,668 | 0.71 | 0.01 | (0.01-0.02) |
Age group | |||||
0-4 yrs | 286,271 | 211,013 | 0.74 | Reference | |
5-14 yrs | 634,837 | 458,886 | 0.72 | −0.01 | (−0.01-0.00) |
15-24 yrs | 559,405 | 395,137 | 0.71 | −0.03 | (−0.03--0.02) |
25-34 yrs | 578,160 | 399,507 | 0.69 | −0.04 | (−0.05--0.04) |
35-44 yrs | 642,419 | 446,121 | 0.69 | −0.03 | (−0.04--0.03) |
45-54 yrs | 527,984 | 364,903 | 0.69 | −0.03 | (−0.04--0.03) |
55-64 yrs | 387,451 | 267,238 | 0.69 | −0.03 | (−0.04--0.03) |
65-74 yrs | 249,283 | 171,477 | 0.69 | −0.04 | (−0.04--0.03) |
75-84 yrs | 168,719 | 106,199 | 0.63 | −0.10 | (−0.11--0.09) |
85-89 yrs | 42,295 | 21,387 | 0.51 | −0.24 | (−0.26--0.23) |
Ethnic group | |||||
Non-MPA | 2,999,269 | 2,069,696 | 0.69 | Reference | |
NZ Māori | 533,291 | 377,854 | 0.71 | 0.01 | (0.01-0.02) |
Pacific Peoples | 287,148 | 220,139 | 0.77 | 0.03 | (0.02-0.03) |
Asian Peoples | 280,431 | 191,490 | 0.68 | −0.04 | (−0.05--0.04) |
NZDep2006 quintile | |||||
1-2 | 618,705 | 441,187 | 0.71 | Reference | |
3-4 | 687,517 | 455,011 | 0.66 | −0.02 | (−0.03--0.02) |
5-6 | 783,175 | 540,159 | 0.69 | −0.02 | (−0.03--0.02) |
7-8 | 946,406 | 678,209 | 0.72 | −0.02 | (−0.02--0.02) |
9-10 | 1,041,021 | 727,302 | 0.70 | −0.05 | (−0.05--0.04) |
Rural classification | |||||
Main urban | 2,988,399 | 2,203,487 | 0.74 | Reference | |
Secondary urban | 286,447 | 193,980 | 0.68 | −0.05 | (−0.05--0.04) |
Minor urban | 376,479 | 263,203 | 0.70 | −0.03 | (−0.03--0.02) |
Rural centre | 104,015 | 52,498 | 0.50 | −0.24 | (−0.24--0.23) |
Other rural | 320,973 | 128,568 | 0.40 | −0.40 | (−0.41—0.40) |