Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review

Farzanfar, Delaram; Abumuamar, Asmaa; Kim, Jayoon; Sirotich, Emily; Wang, Yue; Pullenayegum, Eleanor

doi:10.1186/s12874-017-0418-1

Table 2 Descriptive information and extracted variables of interest for included studies

From: Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review

ID	Study		Study Design	Sample Size		Eligible Study outcome	Country		Method of analysis
1	Adams, et al. (2008)		Retrospective	1806		Hemoglobin A1C levels	USA		Mixed model
2	Astrom, et al. (2014)		Unclear	339		Intraocular pressure change	Sweden		Mixed model
3	Bernstein, et al. (2005)		Retrospective	47		Mean arterial pressure	USA		Repeated measures
4	Biskupiak, et al. (2010)		Retrospective	47,796		Blood pressure goals	USA		Logistic regression
5	Bradford, et al. (2006)		Retrospective	50,741		Low-density lipoprotein goals	USA		Logistic regression
6	Cheung, et al. (2013)		Retrospective	94		DBS electrode impedance	USA		Mixed model
7	Coplan,et al. (2005)		Retrospective	91		Childhood Autism Rating Scale	USA		Mixed model
8	Dhawale, et al. (2013)		Retrospective	7		Peak inspiratory pressure	USA		Repeated measures
9	Elmelund, et al. (2014)		Retrospective	119		Plasma Creatinine levels	Denmark		Mixed model
10	Fattah, et al. (2014)		Retrospective	10		Cephalometric outcomes	Canada		Repeated measures
11	Fatti, et al. (2010)		Retrospective	2332		Virological suppression, weight	South Africa		GEE
12	Flack, et al. (2007)		Unclear	459		Blood pressure response	USA		Mixed model
13	Fong, et al. (2009)		Prospective	408		Cognitive decline	USA		Mixed model
14	Gao, et al. (2014)		Prospective	2906		Changes in Blood pressure	USA		Linear regression
15	Ghate, et al. (2013)		Retrospective	3038		Metabolic parameter monitoring	USA		Linear regression
16	Gofman, et al. (2009)		Retrospective	95		Development of obesity	USA		Mixed model
17	Guelinckx, et al. (2010)		Retrospective	605		Weight gain	Belgium		Mixed model
18	Haas, et al. (2012)		Retrospective	413		Weight loss	USA		Repeated measures
19	Heintzelman, et al. (2013)		Retrospective	33		Pain	Finland		Logistic regression
20	Henes, et al. (2010)		Retrospective	109		Eating and TV behavior	USA		Repeated measures
21	Jehi, et al. (2011)		Prospective	5960		Quality of life	USA		GEE
22	Kharbanda, et al. (2014)		Retrospective	510		Changes in BMI, blood pressure	USA		Mixed model
23	Lasko, et al. (2013)		Retrospective	4360		Unsupervised feature learning	USA		Gaussian regression
24	Maahs, et al. (2007)		Retrospective	360		Total cholesterol, HDL	USA		Mixed model
25	Mahmud, et al. (2010)		Prospective	190		Response to viral infection	Pakistan		Repeated measures
26	Mancevski, et al. (2007)		Retrospective	99		Schizophrenia symptoms	USA		Repeated measures
27	McCoy, et al. (2006)		Retrospective	41		Weight gain	USA		Mixed model
28	Nannetti, et al. (2009)		Prospective	395		Post-stroke recovery	Italy		Repeated measures
29	Pan, et al. (2010)		Prospective	253		Infant growth	USA		Mixed model
30	Patterson, et al. (2009)		Prospective	90		Pulmonary function, weight	USA		Mixed model
31	Pirraglia, et al. (2012)		Prospective	97		Blood pressure goals	USA		Repeated measures
32	Roth, et al. (2010)		Retrospective	102		Disease severity	Canada		Linear regression
33	Ruiz, et al. (2013)		Unclear	701		Mini Mental State Examination	Spain		Mixed model
34	Sarafoglou, et al. (2014)		Retrospective	104		Adult Height	USA		Mixed model
35	Schwartz, et al. (2014)		Retrospective	163,820		Body Mass Index trajectory	USA		Mixed model
36	Snijder, et al. (2012)		Prospective	4680		Fetal growth	Netherlands		Mixed model
37	Sy, et al. (2008)		Retrospective	58		Weight-for-age	Canada		Repeated measures
38	Tamayo, et al. (2015)		Retrospective	725		Obesity	Canada		GEE
39	Tanabe, et al. (2012)		Prospective	342		Changes in pain scores	USA		Linear regression
40	Ting, et al. (2005)		Retrospective	120		Intensity of treatment	USA		Linear regression
41	Ullrich, et al. (2013)		Retrospective	286		Pain and depression measures	USA		Repeated measures
42	Walker, et al. (2009)		Retrospective	119		Quality of life	USA		Mixed model
43	Wong, et al. (2012)		Retrospective	11,735		BMI trajectories	USA		IIW-GEE
44	Zechmann, et al. (2009)		Retrospective	39		Prostate gland volume	Germany		Mixed model
ID	Study	Number of visits provided	Gaps between visits provided	Total follow-up time provided	Assessment for predictors of visit times provided	Need a method that accounts for irregularity	Method to account for irregularity used	Clearly defined end of study	Comparison of those followed for duration of interest vs not
1	Adams, et al. (2008)	No	No	Yes	No	Unclear	No	Yes	No
2	Astrom, et al. (2014)	Yes	Yes	Yes	No	Unclear	No	Yes	No
3	Bernstein, et al. (2005)	No	No	Yes	No	Unclear	No	Yes	No
4	Biskupiak, et al. (2010)	No	No	Yes	No	Unclear	No	Yes	No
5	Bradford, et al. (2006)	No	No	No	No	Unclear	No	Yes	No
6	Cheung, et al. (2013)	Yes	No	No	No	Unclear	No	Yes	No
7	Coplan,et al. (2005)	Yes	No	Yes	No	Unclear	No	No	n/a
8	Dhawale, et al. (2013)	Yes	Yes	Yes	No	Unclear	No	No	No
9	Elmelund, et al. (2014)	No	No	No	No	Unclear	No	Yes	No
10	Fattah, et al. (2014)	Yes	No	Yes	No	Unclear	No	No	No
11	Fatti, et al. (2010)	No	No	Yes	No	Yes	No	Yes	Yes
12	Flack, et al. (2007)	Yes	No	Yes	No	Unclear	No	No	No
13	Fong, et al. (2009)	No	No	No	No	Unclear	No	Yes	No
14	Gao, et al. (2014)	No	No	Yes	No	Yes	No	Yes	Yes
15	Ghate, et al. (2013)	No	No	No	No	Unclear	No	Yes	No
16	Gofman, et al. (2009)	No	No	Yes	No	Unclear	No	No	Yes
17	Guelinckx, et al. (2010)	Yes	No	No	No	Unclear	No	Yes	n/a
18	Haas, et al. (2012)	No	No	No	No	Yes	No	Yes	No
19	Heintzelman, et al. (2013)	Yes	No	Yes	No	Unclear	No	Yes	n/a
20	Henes, et al. (2010)	Yes	No	No	No	Unclear	No	Yes	No
21	Jehi, et al. (2011)	Yes	No	No	No	Unclear	No	Yes	No
22	Kharbanda, et al. (2014)	No	No	No	No	Unclear	No	Yes	No
23	Lasko, et al. (2013)	No	No	No	No	Unclear	No	No	No
24	Maahs, et al. (2007)	Yes	No	Yes	No	Unclear	No	Yes	No
25	Mahmud, et al. (2010)	No	No	No	No	Unclear	No	Yes	No
26	Mancevski, et al. (2007)	No	No	Yes	No	Yes	No	Yes	n/a
27	McCoy, et al. (2006)	Yes	No	Yes	No	Unclear	No	No	No
28	Nannetti, et al. (2009)	Yes	No	Yes	No	Unclear	No	Yes	No
29	Pan, et al. (2010)	Yes	No	Yes	No	Unclear	No	Yes	No
30	Patterson, et al. (2009)	Yes	No	No	No	Unclear	No	Yes	No
31	Pirraglia, et al. (2012)	Yes	No	No	No	Unclear	No	Yes	No
32	Roth, et al. (2010)	No	No	Yes	No	Unclear	No	Yes	n/a
33	Ruiz, et al. (2013)	No	No	No	No	Unclear	No	No	No
34	Sarafoglou, et al. (2014)	No	No	Yes	No	Unclear	No	Yes	No
35	Schwartz, et al. (2014)	Yes	Yes	Yes	No	Unclear	No	Yes	Yes
36	Snijder, et al. (2012)	Yes	No	Yes	No	Unclear	No	Yes	No
37	Sy, et al. (2008)	No	No	No	No	Unclear	No	Yes	No
38	Tamayo, et al. (2015)	Yes	No	Yes	No	Unclear	No	Yes	No
39	Tanabe, et al. (2012)	Yes	No	No	No	Unclear	No	Yes	n/a
40	Ting, et al. (2005)	Yes	No	No	No	Unclear	No	Yes	No
41	Ullrich, et al. (2013)	Yes	No	Yes	Yes	Yes	No	Yes	Yes
42	Walker, et al. (2009)	Yes	No	No	No	Unclear	No	No	No
43	Wong, et al. (2012)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes
44	Zechmann, et al. (2009)	Yes	No	Yes	No	Unclear	No	No	No

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