LASA variables: Result of enlisting attempt

Result of enlisting attempt Main Studies

aresult bresult cresult dresult (LASAz202)

	aresult	bresult	cresult	dresult
-1 no data collected at the previous observation			698	1260
1 deceased before approach		126	417	344
2 refusal		394	90	70
3 ineligible		134	38	43
4 not contacted		44	17	12
5 face-to-face interview, full version	3528	2890	2204	1717
6 face-to-face interview, full version /terminated	54	39	17	20
7 face-to-face interview, short version	218	175	81	135
8 face-to-face interview, short version /terminated	5	3		2
9 phone interview, R interviewed			79	127
10 phone interview, proxy interviewed			164	75
N=	3805	3805	3805	3805

Overview of response within Main and Side Studies (LASAz002)

respnr respondent identification
anwmem respondent identification as network member within the Network Study
zstudy study identification(alphanumeric, 4 positions)
zapprnr sequence number of approach
zdate date of interview (yyyymmdd)
ztime time since first observation (years)
zmode mode of data collection: 1 Computer Assisted Personal Interviewing (CAPI); 2 face-to-face; 3 mail; 4 phone
zrespons result of enlisting: 1 response; 4 refusal; 5 ineligible

For the Depression Study I, some observations were combined with observations for the Network Study. The next variables provide information on this combinations.
zinnws questionnaire included in the questionnaire for the Network Study
znwsstud if zinnws=1, study identification of the observation for the Network Study; values: h1, h2, i1, i2 (h1 and h2 respresenting observations for nws2; i1 and i2 respresenting observations for nws3)
zdepstud inclusion of questions for the Depression Study I; values: dn11, dn12, dn13, dn14, dp11, dp12, dp13, dp14

Study	Wave	zstudy	N	Time since first approach (years)		Response
				M	SD
Main Interview (LSN, LASA)	1	a	4494	0
	2	b	3633	.89	.21	.86
	3	c	2672	3.99	.29	.95
	4	d	2189	6.94	.25	.95
Network Study (as anchor of the network)	*	nws0	1547	0		.48
	1	nws1	671	.41	.15	.86
	2	nws2	593	1.39	.13	.78
	3	nws3	489	2.39	.13	.81
Network Study (as network member)	1	nwl1	90	.40	.25	.79
	2	nwl2	69	1.37	.24	.83
	3	nwl3	50	2.35	.24	.90
Medical interview (next to the second, third and fourth main interview)	1	bmed	3017	.94	.21	.89
	2	cmed	1712	3.93	.23	.88
	3	dmed	1517	6.92	.24	.91
Depression Study I (sample of respondents with depressive symptoms)	1	dp11	293	1.45	.21	.85
	2	dp12	292	1.87	.20	.89
	3	dp13	279	2.29	.20	.89
	4	dp14	266	2.70	.20	.88
	5	dp15	204	3.08	.20	.89
	6	dp16	226	3.48	.20	.91
Depression Study I (sample of respondents without depressive symptoms)	1	dn11	305	1.43	.20	.95
	2	dn12	312	1.84	.18	.94
	3	dn13	304	2.27	.17	.92
	4	dn14	291	2.68	.19	.92
	5	dn15	224	3.06	.19	.93
	6	dn16	256	3.47	.18	.95
Depression Study II (sample of respondents with depressive symptoms)	1	dp21	350	4.87	.18	.90
	2	dp22	326	5.28	.18	.96
	3	dp23	313	5.70	.19	.98
	4	dp24	306	6.12	.18	.97
	5	dp25	298	6.53	.19	.95
Widowhood Study (respondents widowed after the first observation)	1	ww1	190	2.51	.90	.75
	2	ww2	139	2.98	.89	.92
	3	ww3	126	3.50	.90	.95
	4	ww4	120	4.02	.92	.95
	5	ww5	114	4.58	.93	.98

* Cooperation asked in the first wave of the main interview.
Source: Deeg et al, JCE, 2002
Notes.
Included are all birth years (1903-1937, of which the years 1903-1907 were included in LSN only).
Excluded are respondents deceased at the moment of approach and respondents who were not contacted.
Not all side studies are included in this overview.

As consequence of the inclusion of several side studies, the number and type of observations among respondents is very heterogeneous, as is illustrated in the overview of widowhood.

Syntax to compute interval between observations (example for Depression Study II).

get file 'LASAz002.sys'.
select if (zrespons=1).
select if (zstudy="dp21"|zstudy="dp22"|zstudy="dp23"|zstudy="dp24"|zstudy="dp25").
if (respnr=lag(respnr))timelag=ztime-lag(ztime).
recode timelag (sys=0).
format timelag (f4.2).
value labels timelag 0'first observation'.
variable label timelag 'lag between current and previous observation'.
if (zstudy="dp21")timelag1=timelag.
if (zstudy="dp22")timelag2=timelag.
if (zstudy="dp23")timelag3=timelag.
if (zstudy="dp24")timelag4=timelag.
if (zstudy="dp25")timelag5=timelag.
format timelag1 timelag2 timelag3 timelag4 timelag5 (f4.2).
value labels timelag1 timelag2 timelag3 timelag4 timelag5 0'first observation'.
variable label
timelag1 'lag between wave 1 and previous observation'
timelag2 'lag between wave 2 and previous observation'
timelag3 'lag between wave 3 and previous observation'
timelag4 'lag between wave 4 and previous observation'
timelag5 'lag between wave 5 and previous observation'.
aggregate /outfile 'temp.sys' /break respnr
/timelag1 =first(timelag1)
/timelag2 =first(timelag2)
/timelag3 =first(timelag3)
/timelag4 =first(timelag4)
/timelag5 =first(timelag5).
get /file 'temp.sys'.
descriptives all.

Updated 19-09-2001