Table 2 Multivariate logistic regression results modeling physics Ph.D. completion in four analytic samples.

The coefficients for logit and odds ratios (ORs) for Ph.D. completion are reported, along with their SEs. Tier 1 (highest ranked, NRC-R ≤ 20), Tier 2 (25 ≤ NRC-R ≤ 55), and Tier 3 (NRC-R > 55). Reference groups are Tier 3 for ranking and White for race/ethnicity. *P < 0.05; **P < 0.01; ***P < 0.001.

All studentsU.S. onlyU.S. femaleU.S. male
(N = 3962)(N = 2315)(N = 402)(N = 1913)
LogitORLogitORLogitORLogitOR
(SE)(SE)(SE)(SE)(SE)(SE)(SE)(SE)
(Intercept)−1.63**
(0.53)
0.2**
(0.1)
−2.63***
(0.69)
0.07***
(0.05)
−4.46**
(1.65)
1 × 10−2**
(0.02)
−2.05**
(0.77)
0.1**
(0.1)
UGPA0.31*
(0.12)
1.4*
(0.2)
0.60***
(0.16)
1.8***
(0.3)
0.9*
(0.4)
2.5*
(1)
0.47*
(0.18)
1.6*
(0.3)
GRE-Q13 × 10−3**
(4 × 10−3)
1.013**
(0.004)
10 × 10−3*
(5 × 10−3)
1.011*
(0.005)
0.017
(0.012)
1.02
(0.01)
0.01
(6 × 10−3)
1.010
(0.006)
GRE-V−1 × 10−3
(2 × 10−3)
0.999
(0.002)
−1 × 10−4
(3 × 10−3)
0.9999
(0.003)
−1 × 10−3
(7 × 10−3)
0.999
(7 × 10−3)
−5 × 10−6
(3 × 10−3)
1.000
(0.003)
GRE-P3 × 10−3
(2 × 10−3)
1.004
(0.002)
5 × 10−3
(3 × 10−3)
1.005
(0.003)
2 × 10−4
(6 × 10−3)
1.000
(0.006)
5 × 10−3
(3 × 10−3)
1.005
(0.003)
Tier 10.69***
(0.1)
2.0***
(0.2)
0.73***
(0.14)
2.1***
(0.3)
0.90**
(0.34)
2.5**
(0.8)
0.74***
(0.15)
2.1***
(0.3)
Tier 20.23*
(0.1)
1.3*
(0.1)
0.53***
(0.13)
1.7***
(0.2)
0.15
(0.3)
1.2
(0.4)
0.63***
(0.15)
1.9***
(0.3)
Asian−0.02
(0.28)
1.0
(0.3)
−0.01
(0.28)
0.99
(0.28)
0.09
(0.51)
1.1
(0.6)
−0.07
(0.34)
0.9
(0.3)
Black−0.77*
(0.39)
0.5*
(0.2)
−0.72
(0.39)
0.49
(0.19)
−1.08
(1.02)
0.3
(0.3)
−0.65
(0.44)
0.5
(0.2)
Hispanic−0.60*
(0.30)
0.5*
(0.2)
−0.56
(0.3)
0.57
(0.17)
0.58
(0.87)
1.8
(1.6)
−0.77*
(0.33)
0.5*
(0.2)
Native−15
(240)
0
(0)
−15
(240)
0
(0)
−15
(880)
0
(0)
−15
(270)
0
(0)
Other−1.2*
(0.5)
0.3*
(0.1)
−1.14*
(0.48)
0.32*
(0.15)
−0.62
(0.95)
0.5−1.29*
(0.56)
0.3*
(0.2)
Undisclosed−0.25*
(0.1)
0.8*
(0.1)
−0.35**
(0.13)
0.7**
(0.09)
−0.21
(0.29)
0.8
(0.2)
−0.39**
(0.14)
0.7**
(0.1)
Female−0.16
(0.1)
0.9
(0.1)
−0.22
(0.13)
0.8
(0.11)
Non-U.S.0.09
(0.1)
0.9
(0.1)