Table 3.

Individual-level effects on military background. Statistically significant Type III effects highlighted with bold typeface. Odds ratios (OR) for having a military background are shown for each level of categorical variables, and for each one unit increase of continuous variables.

Covariate	Type III test			Odds ratios
	Wald χ2	df	p-value	Level	OR	95% CI
Education	114.0	3	<0.001	No college	Reference level
				B	1.68	0.13; 22.35
				M	1.99	0.16; 25.51
				PhD/MD	0.13	0.01; 1.69
Marital status	1.0	2	0.612	Unmarried	Reference level
				Married	1.18	0.39; 3.60
				Divorced	0.63	0.12; 3.23
Total mission	0.0	1	0.919	OR/mission	0.99	0.82; 1.20
Children	0.0	1	0.934	OR/child	1.01	0.82; 1.24
Decade	22.3	5	<0.001	1960s	Reference level
				1970s	0.39	0.11; 1.34
				1980s	0.13	0.04; 0.42
				1990s	0.10	0.03; 0.34
				2000s	0.07	0.02; 0.24
				2010s	0.17	0.04; 0.72
Agency	10.7	4	0.031	NASA	Reference level
				ROSCOSMOS	0.51	0.28; 0.92
				ESA	0.83	0.33; 2.08
				CNSA	-	-
				CSA	0.27	0.04; 1.71
				JAXA	0.11	0.02; 0.71
Gender	10.5	1	0.001	Women	Reference level
				Men	3.70	1.68; 8.16
Age at first mission	0.0	1	0.851	OR/year	1.00	0.95; 1.04

df: degrees of freedom; CI: confidence interval