Table 2 PRs^† and 95% CIs^† of recovery from probable PTSD^† according to BMI^† in 2012.

	BMI (kg/m²)				P for trend^§
	< 18.5	18.5 to < 25.0	25.0 to < 30.0	≥ 30.0	P for trend^§
Year 2013
No. of participants	174	2147	1063	193
No. of events (PCL-S^† scores < 44)	103	1083	522	83
Crude PRs (95% CIs)	1.17 (1.03–1.34)	Reference	0.97 (0.90–1.05)	0.85 (0.72–1.01)	0.022
Sex-age-adjusted PRs (95% CIs)	1.11 (0.97–1.27)	Reference	1.00 (0.92–1.07)	0.83 (0.70–0.98)	0.104
Multivariate-adjusted PRs^‡ (95% CIs)	1.08 (0.88–1.33)	Reference	1.00 (0.90–1.11)	0.85 (0.68–1.06)	0.367
Year 2014
No. of participants	153	1910	910	166
No. of events (PCL-S scores < 44)	93	1078	495	83
Crude PRs (95% CIs)	1.08 (0.94–1.23)	Reference	0.96 (0.90–1.04)	0.89 (0.76–1.04)	0.083
Sex-age-adjusted PRs (95% CIs)	1.02 (0.89–1.16)	Reference	0.99 (0.92–1.06)	0.87 (0.74–1.02)	0.335
Multivariate-adjusted PRs (95% CIs)	1.02 (0.82–1.26)	Reference	0.99 (0.89–1.10)	0.87 (0.69–1.09)	0.524

^†PR, prevalence ratio; CI, confidence interval; PTSD, post-traumatic stress disorder; BMI, body mass index; PCL-S, Post-traumatic Stress Disorder Checklist-specific.
^‡Multivariate-adjusted PRs were adjusted for sex, age (< 30 years, 30–39 years, 40–49 years, 50–59 years, 60–69 years, or ≥ 70 years), PCL-S scores in 2012 (continuous), smoking (never smoked, quit, or current smoker), drinking (don't drink or only rarely, quit, or drink at least once a month), exercise habit (almost every day 2–4 times/week, once/week, or almost never), sleep habit (satisfied, slightly dissatisfied, quite dissatisfied, or very dissatisfied or haven't slept at all), education level (elementary school・junior high school, high school, vocational college/junior college, or university・graduate school), activities of daily living (independent or dependent), history of cancer or cardiovascular disease (yes or no), house damege (no damage, partial damage or partial collapse, or partial but extensive collapse or total collapse), lose someone close in disaster (yes or no), experience about tsunami following the GEJE (yes or no), experience about nuclear reactor accident (heard the explosion) following the GEJE (yes or no).
^§P for trend was calculated by continuous valuable.

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