Descriptive statistics
Increasing trend of psychological distress and primary healthcare service utilization among young people between 2014 and 2018
A summary of the population weighted trends in psychological distress between 2014 and 2018 suggests that psychological distress increased yearly from 13% in 2014 (95% CI = 12%, 13%) to 18% in 2018 (95% CI = 17%, 19%). Overall, there were substantial gender and age differences in those suffering from psychological distress. For males, 7% (95% CI = 7%, 8%) reported psychological distress compared to 22% among females (95% CI = 22%, 23%). With respect to age, the difference in psychological distress increased from 8% (95% CI = 8%, 9%) for the youngest teens to 22% for the oldest (95% CI = 21%, 23%).
In our sample, 35% (95% CI = 34%, 35%) of the participants used the school health service (the school nurse or doctor), 13% (95% CI = 12%, 13%) used a youth health center, 10% (95% CI = 10%, 10%) used a psychologist, 60% (95% CI = 60%, 60%) used their family doctor and 36% (95% CI = 36%, 36%) used an out-of-hours primary healthcare service during the previous six months. In general, there was a trend of increasing service use in the youth population, increasing from an average of 3.6 consultations in 2014 to 4.1 consultations in 2018 (Table 2).
Young people with high levels of psychological distress tended to consult primary healthcare services more often (M = 6.48, 95% CI= 6.40, 6.55), almost twice as much as their peers with low levels of distress (M = 3.36, 95% CI = 3.28, 3.43).
Table 2. The use of primary healthcare services among young people by year and psychological distress (population weighted).
|
|
Mean (95% CI)
Year
|
|
|
|
|
2014
|
2015
|
2016
|
2017
|
2018
|
Average
|
Health service
|
Psychological distress
|
|
|
|
|
|
|
School nurse or doctor
|
High level
|
1.41 (1.34, 1.48)
|
1.38 (1.31, 1.45)
|
1.47 (1.38, 1.56)
|
1.48 (1.42, 1.54)
|
1.52 (1.46, 1.59)
|
1.46 (1.43, 1.49)
|
Low level
|
0.62 (0.58, 0.67)
|
0.63 (0.59, 0.67)
|
0.64 (0.61, 0.67)
|
0.73 (0.69, 0.77)
|
0.79 (0.74, 0.85)
|
0.69 (0.66, 0.71)
|
Youth health centers
|
High level
|
0.72 (0.67, 0.76)
|
0.64 (0.58, 0.70)
|
0.63 (0.60, 0.67)
|
0.65 (0.61, 0.70)
|
0.65 (0.55, 0.75)
|
0.66 (0.63, 0.69)
|
Low level
|
0.25 (0.22, 0.27)
|
0.21 (0.19, 0.23)
|
0.21 (0.20, 0.23)
|
0.26 (0.23, 0.28)
|
0.26 (0.24, 0.28)
|
0.24 (0.23, 0.25)
|
Psychologist
|
High level
|
1.22 (1.15, 1.28)
|
1.2 (1.16, 1.24)
|
1.19 (1.15, 1.24)
|
1.13 (1.1, 1.17)
|
1.11 (1.08, 1.14)
|
1.16 (1.14, 1.18)
|
Low level
|
0.21 (0.20, 0.23)
|
0.22 (0.20, 0.23)
|
0.21 (0.20, 0.22)
|
0.25 (0.24, 0.25)
|
0.26 (0.24, 0.28)
|
0.23 (0.22, 0.24)
|
Family doctor
|
High level
|
2.20 (2.12, 2.28)
|
2.25 (2.20, 2.29)
|
2.24 (2.18, 2.30)
|
2.25 (2.15, 2.34)
|
2.22 (2.18, 2.26)
|
2.23 (2.20, 2.26)
|
Low level
|
1.48 (1.44, 1.53)
|
1.51 (1.45, 1.56)
|
1.45 (1.42, 1.49)
|
1.53 (1.46, 1.59)
|
1.58 (1.48, 1.68)
|
1.51 (1.48, 1.55)
|
Out-of-hours primary healthcare service
|
High level
|
1.06 (0.99, 1.13)
|
1.12 (1.08, 1.17)
|
1.01 (0.97, 1.06)
|
1.02 (0.98, 1.05)
|
1.04 (1.00, 1.09)
|
1.05 (1.03, 1.07)
|
Low level
|
0.70 (0.68, 0.72)
|
0.76 (0.73, 0.78)
|
0.70 (0.68, 0.73)
|
0.75 (0.74, 0.77)
|
0.80 (0.76, 0.83)
|
0.74 (0.73, 0.76)
|
Average
|
|
3.64 (3.54, 3.74)
|
3.76 (3.62, 3.90)
|
3.64 (3.56, 3.72)
|
3.95 (3.86, 4.05)
|
4.13 (3.99, 4.27)
|
|
Looking more closely at the statutory youth primary healthcare services revealed that the use of the school health service increased from an average of 0.72 consultations per person in 2014 to 0.92 in 2018 (Table 2). Young people tended to consult youth health centers less often than the school health services. Consultation rates for youth health centers increased slightly from 0.31 per person in 2014 to 0.33 in 2018 (Table 2). Young people with high levels of psychological distress used school health services more than twice as much as their peers with low levels of distress (Table 2). The results were similar for youth health centers where young people with high levels of psychological distress used the service close to three times as much as their peers with low levels of distress (Table 2).
In general, there were gender and age differences in primary healthcare service use. Females and older users accessed the services more than males and younger users. On average, females had 1.5 more consultations during a six-month period (M = 4.57, 95% CI = 4.50, 4.64) than males (M = 3.06, 95% CI = 2.96, 3.16). As the users got older, they used primary healthcare services more, with an average difference of 1.3 consultations between grade 8 (M = 3.30, 95% CI = 3.21, 4.30) and third year of upper secondary school (M = 4.58, 95% CI = 4.38, 4.72).
For the statutory youth services specifically, females tended to use both services twice as much as males. For the school health services, females had on average 1.07 consultations (95% CI = 1.04, 1.10) compared to 0.53 (95% CI = 0.51, 0.56) for males. For youth health centers, females had 0.42 consultations (96% CI = 0.40, 0.44) compared to 0.17 (95% CI = 0.17, 0.18) among males. As the young people got older, they generally used the services more. For the school health service, use increased through grades 8 to 10, from 0.82 (95% CI = 0.78, 0.86) in grade 8 to a peak of 0.9 (95% CI = 0.87, 0.93) in grade 10. In the transition to upper secondary education where the availability of this service is reduced, the use of the school health service declined to 0.77 (95% CI = 0.74, 0.79). However, service use then increased as the young people got older to 0.8 (95% CI = 0.74, 0.86) in the third and final year of upper secondary school. For youth health centers, service use increased linearly from 0.17 (95% CI = 0.16, 0.18) in grade 8 to 0.51 (95% CI = 0.46, 0.56) in the last year of upper secondary school.
Regression analysis
Convergence in primary healthcare service utilization for psychological distress among young people between 2014 and 2018
Results from the GLM regression analysis suggest a changing pattern in primary healthcare service use among young people between 2014 and 2018. Results indicate a gross change in service use over time. There was a significant yearly increase in all service types in the youth population (see Additional file 1). The statutory youth primary healthcare services, the school health service (school nurse or doctor) and youth health centers had an estimated yearly increase of 6% and 4% respectively, based on the log means of primary healthcare service use over time. For the remaining primary healthcare services, the use of a psychologist increased by 5% while both the use of family doctor and out-of-hours primary healthcare increased by 2% yearly. Adding psychological distress as a covariate indicated the proportion of the effect of the time coefficient that could be explained by psychological distress among young people. This ranged from 16% in the pattern of use for the school health service to 66% for the use of a psychologist. This suggests that psychological distress can explain a substantial part of the change in young people’s primary healthcare service use between 2014 and 2018.
The interaction term between psychological distress and time that was added to the model was significant and improved the model fit for the school health service (X2 (1, 635) = 8.9, p < 0.01), youth health centers (X2 (1, 635) = 8.6, p < 0.01), psychologist (X2 (1, 635) = 31.9, p < 0.001) and out-of-hours primary healthcare services (X2 (1, 635) = 14.5, p < 0.001), but not for family doctor (see Additional file 2). This indicates that primary healthcare service use follows a different slope for young people depending on whether they have high levels of psychological distress or not. This effect did not change when adjusting for gender, grade, socioeconomic status and service availability. The strongest predictor of primary healthcare service use was psychological distress followed by gender.
Exponentiating the adjusted regression coefficients for primary healthcare service use over time at the average of all included covariates indicates that young people with high levels of psychological distress use health services more than their peers with low levels. However, the increase of service use over time was mainly observed among young people with low levels of psychological distress and not among those with high levels (Figure 1).
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Figure 1. Youth primary healthcare service use by psychological distress and year (predicted values).
Based on the total predicted values, the observed increase in primary healthcare service use in 2014 compared to 2018 equated to an increase of 371 consultations per 1000 among young people with low levels of psychological distress, while it decreased by 68 consultations for young people with high levels psychological distress. The only primary healthcare service which saw an actual increase in use by young people with high levels of psychological distress was the school health service (that is an increase of 150 consultations per 1000). This suggests convergence in primary healthcare service use between young people with low levels of psychological distress and those with high levels. If the current trend remains unchanged, young people with low levels of psychological distress will use primary healthcare services more than those with high levels within 20 years and the point of convergence is expected to be reached before the year 2038.