Publication rate of abstracts presented at Japan Geriatrics Society Annual Meetings (2011–2012): a retrospective observational study

Table 2 Characteristics associated with publication of abstracts presented at the 2011 and 2012 Japan Geriatrics Society Annual Meetings

Characteristics	Total^a	Number (%) of published abstracts^a	Odd ratio (95% confidence interval)^b
Characteristics	Total^a	Number (%) of published abstracts^a	Univariate analysis	Multivariate analysis^c
Year of the conference
2011	297	74 (24.9)	1 [reference]	1 [reference]
2012	321	72 (22.4)	0.87 (0.60–1.26)	0.88 (0.60–1.30)
Presentation format
Poster	130	22 (16.9)	1 [reference]	1 [reference]
Oral	488	124 (25.4)	1.67 (1.01–2.76)*	1.79 (1.05–3.06)*
Study design
Other^d	606	138 (22.8)	1 [reference]	1 [reference]
Randomized controlled trial	12	8 (66.7)	6.78 (2.01–22.86)*	10.79 (3.02–38.53)**
Sample size^e
< 100	299	55 (18.4)	1 [reference]	1 [reference]
≥ 100	307	88 (28.7)	1.78 (1.22–2.61)*	1.97 (1.32–2.95)*
Number of authors
< 3	115	24 (20.9)	1 [reference]	1 [reference]
≥ 3	503	122 (24.3)	1.21 (0.74–1.99)	0.98 (0.56–1.72)
Affiliation of authors
Non-university-associated	162	30 (18.5)	1 [reference]	1 [reference]
University-associated	456	116 (25.4)	1.50 (0.96–2.35)	1.44 (0.88–2.35)

^aValues are the number of abstracts, with the percentage of the total number of published abstracts according to subgroups classified by each variable in parentheses
^bThe level of statistical significance was set at p < 0.05. Asterisks indicate a significant association between the selected variables and publication; * p < 0.05, ** p < 0.001
^cAdjusted for the year of the conference, format, study design, number of authors, affiliation of authors, and sample size of the study
^dThese include observational studies, case reports, case series, simulation analyses, and non-human studies
^eTwelve abstracts in which the sample size was not documented were excluded

ISSN: 1756-0500