| Geographic Sampling in the Ontario Health Surveys Geographic Sampling in the 1990 and 1996/97 Ontario Health Surveys | | 1990 OHS | | | | 1990 OHS
Sample Areas
(42 Public Health Units) | Response Rate | Sample Size
(Ages 12+) | 1996/97 OHS
Sample Areas
(23 Health Areas) | Sample Size (Ages 12+) | | Ontario | 68% | 49,164 | Ontario | 36,892 | | South West | | 10,733 | | 5,912 | | Essex-Windsor | 67% | 1,154 | Essex | 1,452 | | Kent-Chatham | 82% | 1,443 | Kent, Lambton | 1,382 | | Lambton | 72% | 1,246 | | Elgin-St. Thomas | 69% | 1,233 | Elgin, Oxford, Middlesex | 1,587 | | Middlesex-London | 67% | 1,337 | | Oxford County | 70% | 1,270 | | Bruce-Grey-Owen Sound | 74% | 1,838 | Bruce, Grey, Perth, Huron | 1,491 | | Huron | 77% | 1,383 | | Perth District | 61% | 1,075 | | Central South | | 5,337 | Central South | 4,357 | | Niagara | 81% | 1,389 | Niagara | 1,410 | | Hamilton-Wentworth | 73% | 1,340 | Hamilton‑Wentworth | 1,514 | | Brant | 82% | 1,489 | | 1,433 | | Haldimand-Norfolk | 69% | 1,119 | | Central West | | 4,927 | Central West | 5,899 | | Halton | 67% | 1,236 | Halton | 1,415 | | Peel | 51% | 934 | Peel | 1,582 | | Wellington-Dufferin-Guelph | 62% | 1,137 | Wellington, Dufferin | 1,442 | | Waterloo | 86% | 1,620 | Waterloo | 1,460 | | Metro Toronto | | 5,522 | Toronto | 3,772 | | East York | 56% | 992 | | Etobicoke | 68% | 1,201 | | North York | 45% | 811 | | Scarborough | 45% | 764 | | (Old) Toronto City | 48% | 862 | | City of York | 51% | 892 | | Central East | | 5,820 | Central East | 5,974 | | Haliburton, Kawartha & Pine Ridge District | 74% | 1,049 | Northumberland, Victoria, Haliburton, Peterborough | 1,430 | | Peterborough | 70% | 1,089 | | Durham | 70% | 1,460 | Durham | 1,500 | | York Region | 56% | 1,002 | York | 1,480 | | Simcoe County | 78% | 1,220 | Simcoe | 1,564 | | Eastern Region | | 6,675 | Eastern Region | 5,449 | | Ottawa-Carleton | 59% | 1,026 | Ottawa‑Carleton | 2,494 | | Renfrew County | 74% | 1,228 | Renfrew, Prescott & Russell, Stormont, Dundas & Glengarry | 1,093 | | Eastern Ontario | 76% | 1,232 | | Leeds, Grenville & Lanark District | 65% | 1,068 | Lanark/Leeds/ Grenville, Hastings, Prince Edward, Frontenac, Lennox & Addington | 1,862 | | Hastings & Prince Edward Counties | 64% | 1,045 | | Kingston, Frontenac & Lennox & Addington (KFLA) | 69% | 1,076 | | North | | 8,904 | North | 5,529 | | Algoma | 58% | 936 | Algoma, Cochrane | 1,391 | | Porcupine | 73% | 1,186 | | Sudbury | 70% | 1,188 | Manitoulin, Sudbury (R.M.), Sudbury (T.D.) | 1,392 | | Muskoka-Parry Sound | 74% | 1,079 | Muskoka, Parry Sound, Nipissing, Timiskaming | 1,390 | | Nipissing County (North Bay) | 66% | 984 | | Timiskaming | 78% | 1,282 | | Thunder Bay | 63% | 1,038 | Thunder Bay, Kenora, Rainy River | 1,356 | | Northwestern | 74% | 1,211 | |
