Collecting behavioural data using the world wide web: considerations for researchers

S D Rhodes; D A Bowie; K C Hergenrather

doi:10.1136/jech.57.1.68

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Theory and methods

Collecting behavioural data using the world wide web: considerations for researchers

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	Abstract	Full	Pdf
Dec 2002	43	13	16
Jan 2003	38	47	35
Feb 2003	12	35	18
Mar 2003	4	30	18
Apr 2003	8	31	14
May 2003	7	18	13
Jun 2003	9	33	12
Jul 2003	14	21	7
Aug 2003	42	50	7
Sep 2003	14	30	19
Oct 2003	23	25	17
Nov 2003	12	20	10
Dec 2003	12	20	13
Jan 2004	40	89	14
Feb 2004	19	37	17
Mar 2004	19	38	15
Apr 2004	25	41	14
May 2004	43	70	6
Jun 2004	50	77	39
Jul 2004	71	107	18
Aug 2004	53	78	38
Sep 2004	46	86	17
Oct 2004	31	52	9
Nov 2004	16	48	18
Dec 2004	23	60	16
Jan 2005	28	49	26
Feb 2005	25	57	21
Mar 2005	26	86	28
Apr 2005	14	59	36
May 2005	21	74	38
Jun 2005	21	63	35
Jul 2005	23	60	25
Aug 2005	18	42	40
Sep 2005	32	43	40
Oct 2005	25	54	38
Nov 2005	29	51	28
Dec 2005	20	37	22
Jan 2006	29	55	37
Feb 2006	20	40	62
Mar 2006	10	49	69
Apr 2006	17	48	53
May 2006	36	50	42
Jun 2006	27	26	28
Jul 2006	33	28	25
Aug 2006	33	23	25
Sep 2006	60	41	38
Oct 2006	62	70	62
Nov 2006	59	72	65
Dec 2006	24	39	34
Jan 2007	54	58	40
Feb 2007	51	82	59
Mar 2007	74	80	64
Apr 2007	89	23	30
May 2007	65	14	27
Jun 2007	56	10	21
Jul 2007	38	27	21
Aug 2007	55	9	25
Sep 2007	69	14	19
Oct 2007	103	33	43
Nov 2007	65	13	24
Dec 2007	59	6	15
Jan 2008	64	11	11
Feb 2008	67	15	19
Mar 2008	83	27	25
Apr 2008	78	13	24
May 2008	76	7	9
Jun 2008	65	3	10
Jul 2008	66	9	12
Aug 2008	47	11	6
Sep 2008	62	9	7
Oct 2008	54	17	13
Nov 2008	45	21	20
Dec 2008	29	7	14
Jan 2009	36	7	10
Feb 2009	37	23	16
Mar 2009	106	16	24
Apr 2009	61	16	23
May 2009	78	14	12
Jun 2009	88	13	29
Jul 2009	74	12	14
Aug 2009	87	5	8
Sep 2009	72	9	14
Oct 2009	91	6	11
Nov 2009	81	7	17
Dec 2009	48	9	13
Jan 2010	69	19	5
Feb 2010	64	17	20
Mar 2010	90	15	18
Apr 2010	82	43	25
May 2010	66	22	19
Jun 2010	51	13	13
Jul 2010	50	14	15
Aug 2010	44	20	11
Sep 2010	80	24	12
Oct 2010	62	46	20
Nov 2010	71	17	8
Dec 2010	61	12	6
Jan 2011	46	23	13
Feb 2011	61	26	11
Mar 2011	73	23	11
Apr 2011	56	14	19
May 2011	70	10	14
Jun 2011	49	7	12
Jul 2011	55	12	16
Aug 2011	61	11	8
Sep 2011	49	8	15
Oct 2011	93	13	15
Nov 2011	64	21	27
Dec 2011	58	52	43
Jan 2012	52	65	18
Feb 2012	70	45	32
Mar 2012	47	45	38
Apr 2012	46	44	40
May 2012	68	41	30
Jun 2012	73	27	34
Jul 2012	43	48	23
Aug 2012	79	32	45
Sep 2012	57	28	30
Oct 2012	78	132	36
Nov 2012	82	156	29
Dec 2012	61	64	27
Jan 2013	81	85	32
Feb 2013	75	81	26
Mar 2013	88	158	35
Apr 2013	104	141	57
May 2013	61	165	35
Jun 2013	49	199	37
Jul 2013	53	138	22
Aug 2013	51	149	31
Sep 2013	107	138	38
Oct 2013	124	177	22
Nov 2013	117	178	22
Dec 2013	91	139	20
Jan 2014	108	157	31
Feb 2014	93	151	35
Mar 2014	95	298	26
Apr 2014	124	230	41
May 2014	83	435	46
Jun 2014	87	367	39
Jul 2014	55	263	23
Aug 2014	76	290	19
Sep 2014	67	188	26
Oct 2014	69	381	22
Nov 2014	107	271	31
Dec 2014	84	194	21
Jan 2015	70	186	19
Feb 2015	66	125	19
Mar 2015	130	135	31
Apr 2015	134	253	35
May 2015	82	201	30
Jun 2015	63	203	11
Jul 2015	44	161	11
Aug 2015	67	386	18
Sep 2015	69	127	28
Oct 2015	69	106	26
Nov 2015	78	190	24
Dec 2015	62	136	19
Jan 2016	82	125	23
Feb 2016	68	124	19
Mar 2016	108	89	28
Apr 2016	98	82	28
May 2016	55	131	28
Jun 2016	47	77	26
Jul 2016	80	40	15
Aug 2016	63	60	18
Sep 2016	95	71	41
Oct 2016	82	57	25
Nov 2016	108	68	39
Dec 2016	62	90	73
Jan 2017	85	76	20
Feb 2017	50	106	21
Mar 2017	102	133	35
Apr 2017	97	91	44
May 2017	67	97	26
Jun 2017	70	62	27
Jul 2017	157	93	30
Aug 2017	163	71	21
Sep 2017	200	88	36
Oct 2017	196	78	26
Nov 2017	212	90	33
Dec 2017	234	108	29
Jan 2018	208	92	23
Feb 2018	166	71	23
Mar 2018	200	96	24
Apr 2018	274	132	28
May 2018	231	97	29
Jun 2018	197	125	25
Jul 2018	168	100	29
Aug 2018	172	72	42
Sep 2018	165	67	49
Oct 2018	259	131	63
Nov 2018	235	122	60
Dec 2018	198	94	30
Jan 2019	172	70	46
Feb 2019	176	87	67
Mar 2019	229	98	81
Apr 2019	314	91	142
May 2019	198	61	106
Jun 2019	150	60	67
Jul 2019	171	84	85
Aug 2019	126	61	69
Sep 2019	137	63	61
Oct 2019	199	109	58
Nov 2019	205	90	63
Dec 2019	174	99	57
Jan 2020	153	78	32
Feb 2020	177	108	50
Mar 2020	142	83	39
Apr 2020	126	84	32
May 2020	137	94	44
Jun 2020	95	49	30
Jul 2020	128	54	51
Aug 2020	117	49	50
Sep 2020	154	62	83
Oct 2020	261	96	135
Nov 2020	250	94	188
Dec 2020	196	74	58
Jan 2021	164	77	41
Feb 2021	182	71	49
Mar 2021	243	90	107
Apr 2021	287	110	89
May 2021	139	87	55
Jun 2021	56	56	33
Jul 2021	35	36	54
Aug 2021	52	52	45
Sep 2021	49	49	32
Oct 2021	128	56	57
Nov 2021	198	67	71
Dec 2021	165	89	46
Jan 2022	191	115	55
Feb 2022	194	115	76
Mar 2022	265	147	82
Apr 2022	236	114	81
May 2022	321	157	77
Jun 2022	233	130	47
Jul 2022	211	120	41
Aug 2022	221	130	41
Sep 2022	229	119	38
Oct 2022	228	118	47
Nov 2022	268	144	69
Dec 2022	202	112	33
Jan 2023	228	130	42
Feb 2023	255	155	38
Mar 2023	289	125	47
Apr 2023	335	145	88
May 2023	268	136	56
Jun 2023	213	120	28
Jul 2023	183	125	36
Aug 2023	233	121	30
Sep 2023	145	76	41
Oct 2023	183	70	39
Nov 2023	377	189	32
Dec 2023	507	45	16
Jan 2024	367	8	9
Feb 2024	351	5	9
Mar 2024	407	10	14
Total	27082	20444	8573

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