Table I.

Number of participants and questionnaire response rate in the osteoporosis risk factor survey in Greenland

Groups selected			Registereda n	Selectedb n	Responders
Year born	Age	Gender			n	%
1934–42	69–77 years	Women	163	102	60	58.8
1945–47	63–65 years	Women	117	75	40	53.3
1956	54–55 years	Women	105	68	36	52.9
1956	54–55 years	Men	101	72	45	62.5
All			486	317	181	57.1

^aNumber of participants recorded in the national civil registration system.

^bNumber of subjects available at the address.