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Table 2 Mean age at death by gender and birth cohort for retired military personnel (RMPs) and reference populations

From: Relative longevity among retired military personnel: a historical-cohort study

Birth cohort

Male

Female

Δ

95%CI

P value*

Mean (SD)

n

Mean (SD)

n

RMPs

1900–1909

77.88 (10.07)

127

94.75 (5.91)

4

16.87

6.83–26.91

<0.001

1910–1919

78.28 (10.85)

583

89.06 (5.56)

88

10.78

8.47–13.09

<0.001

1920–1929

74.12 (10.08)

1526

81.14 (5.94)

222

7.02

5.66–8.38

<0.001

1930–1939

67.32 (8.68)

871

73.70 (5.34)

127

6.38

4.83–7.93

<0.001

1940–1949

58.47 (7.02)

777

60.50 (5.45)

62

2.03

0.24–3.82

0.026

1950–1959

52.47 (5.31)

382

53.38 (4.05)

32

0.91

−0.97–2.79

0.345

1960–1969

46.97 (3.65)

35

-

0

-

-

-

Reference

1900–1909

79.91 (10.57)

115,951

79.32 (10.63)

110,373

−0.59

−0.68– −0.50

<0.001

1910–1919

76.52 (11.48)

137,389

79.13 (11.46)

149,155

2.61

2.53–2.70

<0.001

1920–1929

73.16 (11.61)

129,948

75.60 (10.96)

127,871

2.44

2.35–2.53

<0.001

1930–1939

65.35 (11.88)

71,343

67.02 (11.13)

54,062

1.67

1.54–1.80

<0.001

1940–1949

53.99 (13.09)

37,372

54.12 (12.00)

23,077

0.13

−0.08–0.34

0.22

1950–1959

44.91 (12.00)

23,347

47.48 (10.05)

13,330

2.57

2.33–2.81

<0.001

1960–1969

36.56 (9.16)

9,056

38.35 (8.42)

4,687

1.79

1.48–2.10

<0.001

  1. Δ = Difference between the means
  2. *Independent samples t-test