Table 2

Binary logistic regression of those military operational characteristics associated with common mental disorder (CMD)

CharacteristicCharacteristic total
n (%)
CMD no case
n (%)
CMD case
n (%)
OR (95% CI)AOR* (95% CI)AOR† (95% CI)AOR‡ (95% CI)AOR§ (95% CI)
Lower morale701 (53.7)281 (40.1)420 (59.9)5.74 (4.48 to 7.36)6.02 (4.58 to 7.90)5.94 (4.46 to 7.91)3.83 (2.93 to 5.00)4.02 (2.88 to 5.63)
Higher morale605 (46.3)480 (79.3)125 (20.7)11111
Lower cohesion360 (26.0)113 (31.4)247 (68.6)4.72 (3.64 to 6.12)4.58 (3.46 to 6.07)4.46 (3.34 to 5.97)2.66 (1.97 to 3.58)2.75 (1.90 to 3.97)
Higher cohesion1026 (74.0)701 (68.3)325 (31.7)11111
Lower leadership250 (18.0)86 (34.4)164 (65.6)3.40 (2.55 to 4.54)2.95 (2.16 to 4.03)3.58 (2.58 to 4.97)1.76 (1.26 to 2.46)1.65 (1.10 to 2.47)
Higher Leadership1136 (82.0)728 (64.1)408 (35.9)11111
Greater problems on the home front429 (33.1)197 (45.9)232 (54.1)2.22 (1.76 to 2.81)2.28 (1.76 to 2.95)2.17 (1.68 to 2.80)2.21 (1.68 to 2.91)2.46 (1.78 to 3.38)
Fewer problems on the home front866 (66.9)566 (65.4)300 (34.6)11111
Planned exercise1159 (83.6)653 (56.3)506 (43.7)1.90 (1.40 to 2.59)2.26 (1.64 to 3.13)2.41 (1.50 to 3.88)1.24 (0.86 to 1.79)2.50 (1.40 to 4.46)
Routine deployment228 (16.4)162 (71.1)66 (28.9)11111
Greater exposure to potentially traumatic events467 (33.8)231 (49.5)236 (50.5)1.78 (1.42 to 2.23)1.60 (1.25 to 2.05)1.69 (1.31 to 2.18)1.44 (1.11 to 1.88)1.17 (0.85 to 1.62)
Lower exposure to potentially traumatic events915 (66.2)581 (63.5)334 (36.5)11111
No preoperational stress brief1200 (87.5)692 (57.7)508 (42.3)1.47 (1.05 to 2.06)1.81 (1.26 to 2.61)1.42 (0.97 to 2.08)1.07 (0.73 to 1.56)1.29 (0.82 to 2.02)
Received preoperational stress brief171 (12.5)114 (66.7)57 (33.3)11111
Land deployments: <5 months1017 (78.5)579 (56.9)438 (43.1)1.33 (1.01 to 1.75)0.97 (0.71 to 1.33)1.42 (1.06 to 1.91)1.26 (0.92 to 1.73)0.93 (0.63 to 1.37)
Land deployments: >5 months279 (21.5)178 (63.8)101 (36.2)11111
Place of work: ships >300 personnel1004 (72.4)570 (56.8)434 (43.2)1.35 (1.06 to 1.72)1.57 (1.21 to 2.04)0.95 (0.65 to 1.39)0.80 (0.59 to 1.07)0.63 (0.39 to 1.00)
Place of work: ships <300 personnel383 (27.6)245 (64.0)138 (36.0)11111
  • *Adjusted for sociodemographic factors (rank, service, service length and age).

  • †Adjusted for operational factors (home front problems, exposure to potentially traumatic events, type of deployment, place of work, preoperational stress brief and land deployment).

  • ‡Adjusted for leadership, morale and cohesion.

  • §Adjusted for all. AOR, adjusted odds ratio.