Table 2

Results of mixed-effects Poisson regressions for the effects of time interval, sociodemographic characteristics and their interactions on the total number of NLEs (N=1932)

Models (M)	Work/financial		Social/interpersonal		Illness (own)		Illness/death (others)
Models (M)	IRR (95% CI)	P value	IRR (95% CI)	P value	IRR (95% CI)	P value	IRR (95% CI)	P value
(M1) main effects (time)
Time: Pre	2.53 (2.31 to 2.76)	<0.001	1.06 (1.00 to 1.13)	0.053	1.98 (1.83 to 2.14)	<0.001	1.24 (1.17 to 1.31)	<0.001
Time: Post	0.84 (0.80 to 0.89)	<0.001	1.07 (1.01 to 1.14)	0.016	1.08 (1.02 to 1.14)	0.007	1.20 (1.15 to 1.26)	<0.001
R² (cond. \| marg.)	0.320 \| 0.174		0.329 \| 0.003		0.240 \| 0.158		0.110 \| 0.055
AIC \| BIC	10212.87 \| 10241.58		11639.89 \| 11668.6		11185.57 \| 11214.27		15007.31 \| 15036.01
(M2) M1+main effects (SCDs)
Sex: female	0.89 (0.80 to 0.98)	0.023	1.18 (1.05 to 1.33)	0.005	0.98 (0.90 to 1.08)	0.727	1.24 (1.15 to 1.33)	<0.001
Age/10	0.86 (0.82 to 0.91)	<0.001	0.71 (0.67 to 0.75)	<0.001	0.98 (0.94 to 1.03)	0.460	1.07 (1.03 to 1.11)	<0.001
School: <10 years	0.86 (0.74 to 0.99)	0.041	0.87 (0.73 to 1.03)	0.101	1.15 (1.02 to 1.30)	0.020	0.99 (0.90 to 1.09)	0.775
School: >10 years	0.97 (0.84 to 1.11)	0.670	1.24 (1.07 to 1.44)	0.004	0.82 (0.72 to 0.93)	0.002	1.02 (0.93 to 1.13)	0.613
R² (cond. \| marg.)	0.326 \| 0.191		0.337 \| 0.084		0.242 \| 0.163		0.111 \| 0.065
AIC \| BIC	10154.97 \| 10212.38		11401.76 \| 11459.16		11171.39 \| 11228.79		14966.56 \| 15023.97
(M3.1) M2+interaction (time×sex)
Pre×female	0.85 (0.71 to 1.01)	0.066	1.01 (0.89 to 1.14)	0.918	0.99 (0.85 to 1.17)	0.933	1.06 (0.95 to 1.19)	0.314
Post×female	0.91 (0.81 to 1.02)	0.108	1.05 (0.93 to 1.18)	0.413	0.86 (0.77 to 0.96)	0.005	0.88 (0.80 to 0.97)	0.008
R² (cond. \| marg.)	0.328 \| 0.194		0.337 \| 0.084		0.243 \| 0.165		0.113 \| 0.068
AIC \| BIC	10149.17 \| 10220.93		11404.62 \| 11476.38		11165.34 \| 11237.1		14963.21 \| 15034.97
(M3.2) M2+interaction (time×age)
Pre×age/10	0.79 (0.73 to 0.85)	<0.001	0.86 (0.81 to 0.91)	<0.001	0.91 (0.85 to 0.98)	0.010	0.92 (0.88 to 0.97)	<0.001
Post×age/10	0.87 (0.82 to 0.91)	<0.001	0.91 (0.86 to 0.97)	0.002	1.01 (0.96 to 1.05)	0.802	0.97 (0.94 to 1.01)	0.173
R² (cond. \| marg.)	0.345 \| 0.212		0.345 \| 0.094		0.248 \| 0.169		0.122 \| 0.077
AIC \| BIC	10052.08 \| 10123.84		11322.16 \| 11393.91		11167.69 \| 11239.45		14944.93 \| 15016.68
(M3.3) M2+interaction (time×education)
Pre×<10 years	0.78 (0.63 to 0.96)	0.018	0.77 (0.65 to 0.90)	0.002	1.01 (0.84 to 1.21)	0.948	0.94 (0.83 to 1.07)	0.363
Pre×>10 years	0.71 (0.57 to 0.89)	0.004	0.97 (0.83 to 1.13)	0.669	0.72 (0.58 to 0.90)	0.004	1.06 (0.91 to 1.23)	0.465
Post×<10 years	0.82 (0.71 to 0.95)	0.010	0.91 (0.77 to 1.08)	0.296	0.99 (0.88 to 1.12)	0.902	0.90 (0.81 to 1.01)	0.068
Post×>10 years	1.06 (0.91 to 1.24)	0.441	0.90 (0.78 to 1.05)	0.175	1.09 (0.93 to 1.28)	0.292	0.91 (0.81 to 1.03)	0.147
R² (cond. \| marg.)	0.328 \| 0.193		0.339 \| 0.087		0.242 \| 0.163		0.113 \| 0.068
AIC \| BIC	10137.67 \| 10223.78		11386.51 \| 11472.62		11170.37 \| 11256.48		14964.54 \| 15050.65

Age is mean centred, sex (reference: male) and school years (reference: 10 years) are dummy coded; The reunification interval (1990–1994) is coded with 0, that is, the coefficients for age, sex and education represent the effects for this time interval. Coefficients with p<0.05 and confidence interval not containing 1 are marked in bold.
AIC, Akaike information criterion; BIC, Bayesian information criterion; cond, conditional R² (fixed+random effects); IRR, incidence rate ratio; marg, marginal R² (only fixed effects); NLE, negative life event; SDCs, sociodemographic characteristics.